cocos2d/cocos2d-x — pull request #2106 by waiter (2013-03-06 01:27:08+00:00)
Title: Update unload effect function (android normal)

when unload effect, sounID maybe null so the app will crash because of NPE.
On some device , i found the app crashes because sounID is null.
So i think it's better to check whether sounID is null or not.