Remove redundant code from southwalk fix (#7052)

Source/player.cpp

@@ -401,7 +401,7 @@ void InitLevelChange(Player &player)
 /**
  * @brief Continue movement towards new tile
  */
-bool DoWalk(Player &player, int variant)
+bool DoWalk(Player &player)
 {
 	// Play walking sound effect on certain animation frames
 	if (*sgOptions.Audio.walkingSound && (leveltype != DTYPE_TOWN || sgGameInitInfo.bRunInTown == 0)) {
@@ -418,20 +418,10 @@ bool DoWalk(Player &player, int variant)
 	}
 
 	// We reached the new tile -> update the player's tile position
-	switch (variant) {
+	dPlayer[player.position.tile.x][player.position.tile.y] = 0;
-	case PM_WALK_NORTHWARDS:
+	player.position.tile = player.position.temp;
-	case PM_WALK_SOUTHWARDS:
+	// dPlayer is set here for backwards compatibility; without it, the player would be invisible if loaded from a vanilla save.
-		dPlayer[player.position.tile.x][player.position.tile.y] = 0;
+	player.occupyTile(player.position.tile, false);
-		player.position.tile = player.position.temp;
-		player.occupyTile(player.position.tile, false);
-		break;
-	case PM_WALK_SIDEWAYS:
-		dPlayer[player.position.tile.x][player.position.tile.y] = 0;
-		player.position.tile = player.position.temp;
-		// dPlayer is set here for backwards comparability, without it the player would be invisible if loaded from a vanilla save.
-		player.occupyTile(player.position.tile, false);
-		break;
-	}
 
 	// Update the coordinates for lighting and vision entries for the player
 	if (leveltype != DTYPE_TOWN) {
@@ -3018,7 +3008,7 @@ void ProcessPlayers()
 				case PM_WALK_NORTHWARDS:
 				case PM_WALK_SOUTHWARDS:
 				case PM_WALK_SIDEWAYS:
-					tplayer = DoWalk(player, player._pmode);
+					tplayer = DoWalk(player);
 					break;
 				case PM_ATTACK:
 					tplayer = DoAttack(player);