added a buch of

#ifdef __APPLE__
#include <OpenGL/gl.h>
#else
#include <GL/gl.h>
#endif
(also for <GL/glu.h>)

so that people don't have to create symlinks in
/System/Library/Frameworks/OpenGL.framework on Mac OS X
(Charles Wardlaw)

source/blender/include/BIF_gl.h

@@ -34,9 +34,13 @@
 #ifndef BIF_GL_H
 #define BIF_GL_H
 
+#ifdef __APPLE__
+#include <OpenGL/gl.h>
+#include <OpenGL/glu.h>
+#else
 #include <GL/gl.h>
 #include <GL/glu.h>
-
+#endif
 	/*
 	 * these should be phased out. cpack should be replaced in
 	 * code with calls to glColor3ub, lrectwrite probably should