Fix regression in CCDrawManager where backgrounds no longer showed up and images would not show up on the screen correctly.
Fix regression in CCDrawManager where backgrounds no longer showed up and images would not show up on the screen correctly.

This fixes multiple drawing problems including EffectAdvancedTest, ClippingNodeTest, TransitionTest, SpriteTest where images would all of a sudden disappear or not show up altogether.

mono/CocosSharp,TukekeSoft/CocosSharp,mono/CocosSharp,MSylvia/CocosSharp,hig-ag/CocosSharp,MSylvia/CocosSharp,netonjm/CocosSharp,TukekeSoft/CocosSharp,hig-ag/CocosSharp,zmaruo/CocosSharp,netonjm/CocosSharp,zmaruo/CocosSharp,haithemaraissia/CocosSharp,haithemaraissia/CocosSharp