[MC-4563] Droping stacked itens crash

Simple, droping stacked items using Ctrl+Q may crash the game.

Steps to Reproduce:
Try to drop random stacked items.

Linked issues

duplicates 1

MC-4537 NullPointerException with nothing in your hand Resolved

Comments 2

Tails 2012-12-13T16:11:21Z

Duplicate of MC-4537 , please use the search function to see if your bug has already been submitted. Currently over 35% of tickets are being closed as duplicate.

Tails 2012-12-13T16:11:51Z

Please do not mark issues as private, unless your bug report is a security issue containing information that may compromise your server/client.