Windows: Fixed building of ali3dogl.cpp without modifying glext.h.
Windows: Fixed building of ali3dogl.cpp without modifying glext.h.

humble/ags-geminirue,OutOfOrder/ags-geminirue,OutOfOrder/ags-geminirue,humble/ags-geminirue,OutOfOrder/ags-geminirue,humble/ags-geminirue,humble/ags-geminirue,humble/ags-geminirue,humble/ags-geminirue,humble/ags-geminirue,OutOfOrder/ags-geminirue,OutOfOrder/ags-geminirue,OutOfOrder/ags-geminirue,OutOfOrder/ags-geminirue