fixed #3083: fixed a Scale9Sprite's bug that setCapInsets is invalid
Merge pull request #1210 from dingpinglv/Iss3083_Scale9SpriteBug

fixed #3083: fixed a Scale9Sprite's bug that setCapInsets is invalid
Merge branch 'develop' of https://github.com/cocos2d/cocos2d-html5 into dirty_develop