fixed #2833: Correct a mistake for cc.Sprite
Merge branch 'develop' of https://github.com/cocos2d/cocos2d-html5 into Iss2833_ReturnNewObjectForFunciton
Merge pull request #1165 from dingpinglv/Iss2833_ReturnNewObjectForFunciton

fixed #2833: Correct a mistake for cc.Sprite