Add Attributes Filter

I was testing a filter by SethBling, in MCEdit. And I was in the world while I edited the chest. I reloaded my world after saving in MCEdit and I opened the filtered chest, and I crashed.

---- Minecraft Crash Report ----
// I bet Cylons wouldn't have this problem.

Time: 3-7-13 14:50
Description: Rendering screen

java.lang.IllegalArgumentException: Modifier name cannot be empty
	at org.apache.commons.lang3.Validate.notEmpty(Validate.java:398)
	at oq.<init>(SourceFile:31)
	at tm.a(SourceFile:94)
	at xz.D(SourceFile:580)
	at xz.a(SourceFile:471)
	at awp.a(SourceFile:188)
	at awp.a(SourceFile:168)
	at bet.b(SourceFile:718)
	at atn.S(SourceFile:685)
	at atn.d(SourceFile:618)
	at net.minecraft.client.main.Main.main(SourceFile:101)


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

-- Head --
Stacktrace:
	at org.apache.commons.lang3.Validate.notEmpty(Validate.java:398)
	at oq.<init>(SourceFile:31)
	at tm.a(SourceFile:94)
	at xz.D(SourceFile:580)
	at xz.a(SourceFile:471)
	at awp.a(SourceFile:188)
	at awp.a(SourceFile:168)

-- Screen render details --
Details:
	Screen name: axa
	Mouse location: Scaled: (132, 53). Absolute: (264, 372)
	Screen size: Scaled: (427, 240). Absolute: (854, 480). Scale factor of 2

-- Affected level --
Details:
	Level name: MpServer
	All players: 1 total; [bcx['faabmaster'/22717, l='MpServer', x=-441,63, y=5,62, z=-644,39]]
	Chunk stats: MultiplayerChunkCache: 325
	Level seed: 0
	Level generator: ID 01 - flat, ver 0. Features enabled: false
	Level generator options: 
	Level spawn location: World: (-685,4,-495), Chunk: (at 3,0,1 in -43,-31; contains blocks -688,0,-496 to -673,255,-481), Region: (-2,-1; contains chunks -64,-32 to -33,-1, blocks -1024,0,-512 to -513,255,-1)
	Level time: 22723 game time, 22723 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: creative (ID 1). Hardcore: false. Cheats: false
	Forced entities: 2 total; [nx['Experience Orb'/22719, l='MpServer', x=-438,53, y=4,25, z=-587,72], bcx['faabmaster'/22717, l='MpServer', x=-441,63, y=5,62, z=-644,39]]
	Retry entities: 0 total; []
Stacktrace:
	at bcu.a(SourceFile:284)
	at atn.b(SourceFile:1743)
	at atn.d(SourceFile:627)
	at net.minecraft.client.main.Main.main(SourceFile:101)

-- System Details --
Details:
	Minecraft Version: 1.6.1
	Operating System: Windows 7 (amd64) version 6.1
	Java Version: 1.7.0_17, Oracle Corporation
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
	Memory: 150014520 bytes (143 MB) / 399245312 bytes (380 MB) up to 954466304 bytes (910 MB)
	JVM Flags: 1 total; -Xmx1G
	AABB Pool Size: 659 (36904 bytes; 0 MB) allocated, 5 (280 bytes; 0 MB) used
	Suspicious classes: No suspicious classes found.
	IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
	Launched Version: 1.6.1
	LWJGL: 2.9.0
	OpenGL: Intel(R) HD Graphics Family GL version 3.0.0 - Build 8.15.10.2266, Intel
	Is Modded: Probably not. Jar signature remains and client brand is untouched.
	Type: Client (map_client.txt)
	Resource Pack: Default
	Profiler Position: N/A (disabled)
	Vec3 Pool Size: 67 (3752 bytes; 0 MB) allocated, 28 (1568 bytes; 0 MB) used