* Revert 1176 -- MinGW's headers are too old *sigh*

* Revert to using literal function pointers for GL extensions rather than PFN*
  typedefs as some platforms' headers are broken enough that they prevent
  SDL_opengl.h from fixing things up if the PFN* typedefs are missing

code/renderer/tr_local.h

@@ -1041,6 +1041,7 @@ extern cvar_t	*r_ignorehwgamma;		// overrides hardware gamma capabilities
 
 extern cvar_t	*r_allowExtensions;				// global enable/disable of OpenGL extensions
 extern cvar_t	*r_ext_compressed_textures;		// these control use of specific extensions
+extern cvar_t	*r_ext_multitexture;
 extern cvar_t	*r_ext_compiled_vertex_array;
 extern cvar_t	*r_ext_texture_env_add;