Core/Player: fix teleporting while on vehicle. Closes #7812 thx joschiwald

src/server/game/Entities/Player/Player.cpp

@@ -2113,6 +2113,9 @@ bool Player::TeleportTo(uint32 mapid, float x, float y, float z, float orientati
     else
         sLog->outDebug(LOG_FILTER_MAPS, "Player %s is being teleported to map %u", GetName(), mapid);
 
+    if (m_vehicle)
+        ExitVehicle();
+
     // reset movement flags at teleport, because player will continue move with these flags after teleport
     SetUnitMovementFlags(0);
     DisableSpline();