Core/Movement: Final fix for MSG_MOVE_TELEPORT

* Creator Subv, (thx to Shauren also who stated that this packed should be used when researchs were started)
- You all should'be thankful, that bug was a real bitch
* Fix creatures using NearTeleportTo (example Urom in Oculus, Skeram/Viscidus in AQ and Heigan in Naxxramas)

src/server/game/Entities/Unit/Unit.cpp

@@ -17324,22 +17324,30 @@ void Unit::NearTeleportTo(float x, float y, float z, float orientation, bool cas
         ToPlayer()->TeleportTo(GetMapId(), x, y, z, orientation, TELE_TO_NOT_LEAVE_TRANSPORT | TELE_TO_NOT_LEAVE_COMBAT | TELE_TO_NOT_UNSUMMON_PET | (casting ? TELE_TO_SPELL : 0));
     else
     {
-        UpdatePosition(x, y, z, orientation, true);
-        Position pos; // dummy, not used for creatures.
+        Position pos = {x, y, z, orientation};
+
         SendTeleportPacket(pos);
+        UpdatePosition(x, y, z, orientation, true);
         UpdateObjectVisibility();
     }
 }
 
-void Unit::SendTeleportPacket(Position& oldPos)
+void Unit::SendTeleportPacket(Position& pos)
 {
+    Position oldPos = {GetPositionX(), GetPositionY(), GetPositionZMinusOffset(), GetOrientation()};
+    if (GetTypeId() == TYPEID_UNIT)
+    {
+        Relocate(&pos);
+    }
     WorldPacket data2(MSG_MOVE_TELEPORT, 38);
     data2.append(GetPackGUID());
     BuildMovementPacket(&data2);
-    
+
+    if (GetTypeId() == TYPEID_UNIT)
+        Relocate(&oldPos);   
     if (GetTypeId() == TYPEID_PLAYER)
-        Relocate(&oldPos);
-        
+        Relocate(&pos);
+
     SendMessageToSet(&data2, true);
 }