Add renderercommon/tr_common.h

code/renderergl2/tr_init.c

@@ -1476,6 +1476,9 @@ void RE_Shutdown( qboolean destroyWindow ) {
 	// shut down platform specific OpenGL stuff
 	if ( destroyWindow ) {
 		GLimp_Shutdown();
+
+		Com_Memset( &glConfig, 0, sizeof( glConfig ) );
+		Com_Memset( &glState, 0, sizeof( glState ) );
 	}
 
 	tr.registered = qfalse;