$NetBSD: patch-ag,v 1.2 2010/08/27 06:11:50 adam Exp $

--- simgear/screen/extensions.hxx.orig	2010-02-17 15:39:22.000000000 +0000
+++ simgear/screen/extensions.hxx
@@ -409,6 +409,7 @@ typedef BOOL (APIENTRY * wglSetPbufferAt
 
 /* GLX pcific OpenGL extenstions */
 #include <GL/glx.h>
+#include <GL/glxext.h>
 
 #ifndef GLX_ARB_multisample
 #define GLX_ARB_multisample1