Added OpenGL framework check
Added OpenGL framework check


DentonW/DevIL,Agadoul/DevIL,Agadoul/DevIL,DentonW/DevIL,DentonW/DevIL,bcampbell/DevIL,bcampbell/DevIL,bcampbell/DevIL,Agadoul/DevIL,bcampbell/DevIL,DentonW/DevIL,bcampbell/DevIL,bcampbell/DevIL,Agadoul/DevIL,Agadoul/DevIL,DentonW/DevIL,DentonW/DevIL,Agadoul/DevIL