Crash ingame invedit Monster Spawners

With ingame Invedit (TooManyItems) Placing a Monster Spawner the game crash:

---- Minecraft Crash Report ----
// This is a token for 1 free hug. Redeem at your nearest Mojangsta: [~~HUG~~]

Time: 06/03/13 14:36
Description: Unexpected error

java.lang.NullPointerException
	at TMIItemSpawner.a(TMIItemSpawner.java:35)
	at wg.a(SourceFile:97)
	at bdl.a(SourceFile:246)
	at net.minecraft.client.Minecraft.c(SourceFile:972)
	at net.minecraft.client.Minecraft.l(SourceFile:1287)
	at net.minecraft.client.Minecraft.K(SourceFile:572)
	at net.minecraft.client.Minecraft.run(SourceFile:524)
	at java.lang.Thread.run(Unknown Source)


A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------

-- Head --
Stacktrace:
	at TMIItemSpawner.a(TMIItemSpawner.java:35)
	at wg.a(SourceFile:97)
	at bdl.a(SourceFile:246)
	at net.minecraft.client.Minecraft.c(SourceFile:972)

-- Affected level --
Details:
	Level name: MpServer
	All players: 1 total; [bdp['sxriter'/339, l='MpServer', x=149,20, y=44,62, z=285,24]]
	Chunk stats: MultiplayerChunkCache: 441
	Level seed: 0
	Level generator: ID 00 - default, ver 1. Features enabled: false
	Level generator options: 
	Level spawn location: World: (36,64,269), Chunk: (at 4,4,13 in 2,16; contains blocks 32,0,256 to 47,255,271), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
	Level time: 2828 game time, 2828 day time
	Level dimension: 0
	Level storage version: 0x00000 - Unknown?
	Level weather: Rain time: 0 (now: false), thunder time: 0 (now: false)
	Level game mode: Game mode: survival (ID 0). Hardcore: false. Cheats: false
	Forced entities: 77 total; [qi['Sheep'/275, l='MpServer', x=179,97, y=64,00, z=206,16], qa['Bat'/274, l='MpServer', x=170,48, y=47,02, z=207,85], ql['Squid'/278, l='MpServer', x=174,63, y=59,34, z=244,53], ql['Squid'/277, l='MpServer', x=175,31, y=60,41, z=249,97], ro['Creeper'/276, l='MpServer', x=170,31, y=21,00, z=231,97], qi['Sheep'/287, l='MpServer', x=167,13, y=63,00, z=220,16], rz['Skeleton'/262, l='MpServer', x=157,03, y=36,00, z=255,50], ro['Creeper'/263, l='MpServer', x=161,96, y=27,00, z=260,31], rz['Skeleton'/266, l='MpServer', x=151,50, y=32,00, z=282,50], rz['Skeleton'/267, l='MpServer', x=150,53, y=32,00, z=283,02], sd['Zombie'/264, l='MpServer', x=152,75, y=36,00, z=266,75], sd['Zombie'/265, l='MpServer', x=154,95, y=36,00, z=256,53], sb['Spider'/268, l='MpServer', x=152,34, y=34,00, z=288,28], sd['Zombie'/305, l='MpServer', x=217,97, y=20,00, z=210,53], rz['Skeleton'/170, l='MpServer', x=78,50, y=16,00, z=297,50], sd['Zombie'/307, l='MpServer', x=217,99, y=13,00, z=281,49], qa['Bat'/168, l='MpServer', x=74,88, y=45,10, z=259,00], sd['Zombie'/306, l='MpServer', x=218,50, y=15,00, z=227,50], rz['Skeleton'/308, l='MpServer', x=212,16, y=15,00, z=294,50], sd['Zombie'/313, l='MpServer', x=227,31, y=20,00, z=205,53], ro['Creeper'/163, l='MpServer', x=77,56, y=27,00, z=233,03], sd['Zombie'/166, l='MpServer', x=70,50, y=20,00, z=266,50], qi['Sheep'/316, l='MpServer', x=226,25, y=64,00, z=219,34], sb['Spider'/165, l='MpServer', x=72,59, y=50,00, z=257,41], rz['Skeleton'/164, l='MpServer', x=71,09, y=38,00, z=234,59], ql['Squid'/288, l='MpServer', x=182,63, y=59,31, z=239,53], sd['Zombie'/186, l='MpServer', x=89,30, y=11,00, z=250,70], rz['Skeleton'/187, l='MpServer', x=80,50, y=42,00, z=255,50], ql['Squid'/289, l='MpServer', x=182,31, y=61,41, z=246,25], qi['Sheep'/290, l='MpServer', x=186,19, y=63,00, z=354,50], ro['Creeper'/184, l='MpServer', x=78,53, y=27,00, z=211,77], qi['Sheep'/291, l='MpServer', x=187,50, y=63,00, z=357,50], qi['Sheep'/185, l='MpServer', x=92,78, y=68,00, z=208,16], qi['Sheep'/292, l='MpServer', x=190,91, y=64,00, z=358,84], rz['Skeleton'/190, l='MpServer', x=94,69, y=38,00, z=268,75], rz['Skeleton'/191, l='MpServer', x=95,56, y=26,00, z=287,06], rz['Skeleton'/294, l='MpServer', x=201,50, y=50,00, z=223,50], qa['Bat'/188, l='MpServer', x=84,82, y=42,00, z=252,33], sd['Zombie'/189, l='MpServer', x=81,53, y=42,00, z=253,94], sd['Zombie'/295, l='MpServer', x=194,97, y=43,00, z=232,59], rz['Skeleton'/296, l='MpServer', x=192,94, y=50,00, z=226,53], ro['Creeper'/297, l='MpServer', x=192,94, y=50,00, z=227,75], sd['Zombie'/298, l='MpServer', x=205,47, y=16,00, z=299,47], qi['Sheep'/300, l='MpServer', x=192,06, y=64,00, z=352,03], sd['Zombie'/182, l='MpServer', x=92,78, y=11,30, z=217,30], sd['Zombie'/183, l='MpServer', x=88,44, y=12,00, z=219,41], ro['Creeper'/206, l='MpServer', x=102,94, y=36,00, z=206,31], qa['Bat'/193, l='MpServer', x=91,03, y=26,55, z=349,14], rb['item.item.seeds'/192, l='MpServer', x=86,69, y=64,13, z=305,47], rp['Enderman'/194, l='MpServer', x=88,34, y=56,00, z=343,66], qi['Sheep'/220, l='MpServer', x=97,06, y=70,00, z=346,97], qi['Sheep'/221, l='MpServer', x=104,50, y=73,00, z=344,50], qi['Sheep'/222, l='MpServer', x=101,44, y=72,00, z=351,24], rz['Skeleton'/322, l='MpServer', x=225,50, y=55,00, z=231,09], rz['Skeleton'/216, l='MpServer', x=107,88, y=41,00, z=273,47], rz['Skeleton'/217, l='MpServer', x=99,50, y=27,00, z=288,50], qa['Bat'/218, l='MpServer', x=90,24, y=36,84, z=348,29], sd['Zombie'/321, l='MpServer', x=228,53, y=22,00, z=240,21], qi['Sheep'/219, l='MpServer', x=105,41, y=75,00, z=350,22], qi['Sheep'/212, l='MpServer', x=107,09, y=65,00, z=229,53], sd['Zombie'/213, l='MpServer', x=101,50, y=16,00, z=255,50], sd['Zombie'/214, l='MpServer', x=100,09, y=19,00, z=247,50], sd['Zombie'/215, l='MpServer', x=99,50, y=16,00, z=254,50], qi['Sheep'/209, l='MpServer', x=97,50, y=70,00, z=206,50], qi['Sheep'/210, l='MpServer', x=117,32, y=63,00, z=225,32], qi['Sheep'/211, l='MpServer', x=115,94, y=64,00, z=224,06], ro['Creeper'/238, l='MpServer', x=126,50, y=37,00, z=361,50], rz['Skeleton'/237, l='MpServer', x=122,97, y=18,00, z=269,84], qa['Bat'/236, l='MpServer', x=113,80, y=12,53, z=270,77], qa['Bat'/235, l='MpServer', x=123,88, y=11,16, z=271,33], qa['Bat'/234, l='MpServer', x=127,05, y=24,79, z=267,79], sd['Zombie'/233, l='MpServer', x=123,06, y=22,00, z=254,56], qi['Sheep'/232, l='MpServer', x=111,09, y=63,00, z=239,09], rz['Skeleton'/231, l='MpServer', x=125,94, y=12,00, z=228,47], bdp['sxriter'/339, l='MpServer', x=149,20, y=44,62, z=285,24], ro['Creeper'/250, l='MpServer', x=142,42, y=31,94, z=261,44], sd['Zombie'/249, l='MpServer', x=136,94, y=24,00, z=251,50]]
	Retry entities: 0 total; []
Stacktrace:
	at bdm.a(SourceFile:282)
	at net.minecraft.client.Minecraft.b(SourceFile:1879)
	at net.minecraft.client.Minecraft.run(SourceFile:538)
	at java.lang.Thread.run(Unknown Source)

-- System Details --
Details:
	Minecraft Version: 13w10b
	Operating System: Windows 7 (x86) version 6.1
	Java Version: 1.7.0_06, Oracle Corporation
	Java VM Version: Java HotSpot(TM) Client VM (mixed mode), Oracle Corporation
	Memory: 383166024 bytes (365 MB) / 519110656 bytes (495 MB) up to 1037959168 bytes (989 MB)
	JVM Flags: 2 total; -Xms512m -Xmx1024m
	AABB Pool Size: 9794 (548464 bytes; 0 MB) allocated, 3 (168 bytes; 0 MB) used
	Suspicious classes: _tmi_MgButtonHandler, _tmi_MgItemHandler, _tmi_MgFocusHandler, ...]
	IntCache: cache: 7, tcache: 0, allocated: 3, tallocated: 63
	LWJGL: 2.4.2
	OpenGL: Intel(R) HD Graphics Family GL version 3.0.0 - Build 8.15.10.2266, Intel
	Is Modded: Very likely; Jar signature invalidated
	Type: Client (map_client.txt)
	Texture Pack: Default
	Profiler Position: N/A (disabled)
	Vec3 Pool Size: 4963 (277928 bytes; 0 MB) allocated, 17 (952 bytes; 0 MB) used