* 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_shader.c

@@ -1761,7 +1761,7 @@ static qboolean CollapseMultitexture( void ) {
 	int i;
 	textureBundle_t tmpBundle;
 
-	if ( glConfig.numTextureUnits < 2 ) {
+	if ( !qglActiveTextureARB ) {
 		return qfalse;
 	}