Added missing glext.h for anisotropic filtering

git-svn-id: https://svn.code.sf.net/p/vbam/code/trunk@35 a31d4220-a93d-0410-bf67-fe4944624d44

src/win32/OpenGL.cpp

@@ -32,8 +32,13 @@
 
 // OpenGL
 #include <gl/GL.h> // main include file
+#include <gl/glext.h>
 typedef BOOL (APIENTRY *PFNWGLSWAPINTERVALFARPROC)( int );
 
+#ifndef GL_TEXTURE_MAX_ANISOTROPY_EXT
+	#define GL_TEXTURE_MAX_ANISOTROPY_EXT 0x84FE
+#endif
+
 extern int Init_2xSaI(u32);
 extern void winlog(const char *,...);
 extern int systemSpeed;