- Fix already defined command warnings for minimize

- Fix recursive CL_Shutdown warning and "command already defined" warnings when quitting while playing on a server that changed the gamedir.

code/sys/sys_main.c

@@ -550,7 +550,7 @@ void Sys_SigHandler( int signal )
 	{
 		signalcaught = qtrue;
 #ifndef DEDICATED
-		CL_Shutdown(va("Received signal %d", signal), qtrue);
+		CL_Shutdown(va("Received signal %d", signal), qtrue, qtrue);
 #endif
 		SV_Shutdown(va("Received signal %d", signal) );
 	}