Fix special map usage

- Free header on `CLEAR LEVELS` even if it's `tutorialmap`
- `titlemap` infinite recursion prevention Z_Free's instead of leaking

src/deh_soc.c

@@ -151,9 +151,6 @@ void clear_levels(void)
 		if (!mapheaderinfo[nummapheaders])
 			continue;
 
-		if (strcmp(mapheaderinfo[nummapheaders]->lumpname, tutorialmap) == 0) // Sal: Is this needed...?
-			continue;
-
 		// Custom map header info
 		// (no need to set num to 0, we're freeing the entire header shortly)
 		Z_Free(mapheaderinfo[nummapheaders]->customopts);

src/f_finale.c

@@ -1145,7 +1145,7 @@ void F_StartTitleScreen(void)
 		globalweather = mapheaderinfo[titleMapNum]->weather;
 
 		G_DoLoadLevel(true);
-		if (!titleMapNum)
+		if (!titlemap)
 			return;
 
 		players[displayplayers[0]].playerstate = PST_DEAD; // Don't spawn the player in dummy (I'm still a filthy cheater)

src/g_game.c

@@ -1361,7 +1361,8 @@ void G_DoLoadLevel(boolean resetplayer)
 	{
 		if (gamemap < 1 || gamemap > nummapheaders)
 		{
-			titlemap = 0; // let's not infinite recursion ok
+			Z_Free(titlemap);
+			titlemap = NULL; // let's not infinite recursion ok
 			Command_ExitGame_f();
 			return;
 		}