Fixed: corrected a bug of ccs.Armature that it crashed when adding a child to it.
Merge branch 'develop' of https://github.com/cocos2d/cocos2d-html5 into setTransform
Merge pull request #2536 from dingpinglv/setTransform

Fixed: corrected a bug of ccs.Armature that it crashed when adding a child to it.