Fix for collisions between sprites that are defined in sprite sheets.
Fix for collisions between sprites that are defined in sprite sheets.

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