Closed #4980: Fixed a bug of ccui.LoadingBar that its barRendererScaleChangedWithSize is incorrect.
Merge branch 'develop' of https://github.com/cocos2d/cocos2d-html5 into Iss4980_UILoadingBar
Merge pull request #1814 from dingpinglv/Iss4980_UILoadingBar

Closed #4980: Fixed a bug of ccui.LoadingBar that its barRendererScaleChangedWithSize is incorrect.