cocos2d/cocos2d-iphone — pull request #707 by NickyWeber (2014-04-16 14:12:37+00:00)
Title: Bugfix: Setting CCNode's blendFunc won't show #705 

RenderState is not invalidated when blendFunc changes.
Solution: reuse blendMode setter, instead of setting the value directly. That will invalidate the renderState if the blendMode changes.