Fix restoring fs_game when default.cfg is missing.

code/qcommon/files.c

@@ -3828,7 +3828,7 @@ void FS_Restart( int checksumFeed ) {
 		if (lastValidBase[0]) {
 			FS_PureServerSetLoadedPaks("", "");
 			Cvar_Set("fs_basepath", lastValidBase);
-			Cvar_Set("fs_gamedirvar", lastValidGame);
+			Cvar_Set("fs_game", lastValidGame);
 			lastValidBase[0] = '\0';
 			lastValidGame[0] = '\0';
 			FS_Restart(checksumFeed);