Don't send a 0-length command to cgame during map_restart.

Fixes Bugzilla #3965.

code/client/cl_cgame.c

@@ -339,6 +339,8 @@ rescan:
 		// clear notify lines and outgoing commands before passing
 		// the restart to the cgame
 		Con_ClearNotify();
+		// reparse the string, because Con_ClearNotify() may have done another Cmd_TokenizeString()
+		Cmd_TokenizeString( s );
 		Com_Memset( cl.cmds, 0, sizeof( cl.cmds ) );
 		return qtrue;
 	}