[ogl-sample] suggested change for glcore.h

[Brian Paul <brianp@xxxxxxxxxxx>]

The gfx/include/gl/internal/glcore.h file has the following:


#if __GL_NUMBER_OF_AUX_BUFFERS > 0
    __GLdrawableBuffer *auxBuffer;
#endif


The problem is __GL_NUMBER_OF_AUX_BUFFERS is never defined, resulting
in a lot of compiler warnings.  The suggested change is:

#if defined(__GL_NUMBER_OF_AUX_BUFFERS) && (__GL_NUMBER_OF_AUX_BUFFERS > 0)
    __GLdrawableBuffer *auxBuffer;
#endif


-Brian