Core/WorldObject: Properly initialize position data for all types when initially creating them. Fixes some issues with PvP objectives not having the correct area ID set on initialization.

Port From (https://github.com/TrinityCore/TrinityCore/commit/e6be53d1417e733f0916ff305960cfac3e2ca551)

Source/Game/Entities/Creature/Creature.cs

@@ -774,6 +774,7 @@ namespace Game.Entities
                 Log.outError(LogFilter.Unit, "Creature.Create: given coordinates for creature (guidlow {0}, entry {1}) are not valid (X: {2}, Y: {3}, Z: {4}, O: {5})", guidlow, entry, x, y, z, ang);
                 return false;
             }
+            UpdatePositionData();
 
             // Allow players to see those units while dead, do it here (mayby altered by addon auras)
             if (cinfo.TypeFlags.HasAnyFlag(CreatureTypeFlags.GhostVisible))

Source/Game/Entities/GameObject/GameObject.cs

@@ -194,6 +194,8 @@ namespace Game.Entities
                 return false;
             }
 
+            UpdatePositionData();
+
             SetZoneScript();
             if (m_zoneScript != null)
             {

Source/Game/Entities/Player/Player.DB.cs

@@ -2841,6 +2841,7 @@ namespace Game.Entities
             }
 
             SetMap(map);
+            UpdatePositionData();
 
             // now that map position is determined, check instance validity
             if (!CheckInstanceValidity(true) && !IsInstanceLoginGameMasterException())

Source/Game/Entities/Player/Player.cs

@@ -192,6 +192,7 @@ namespace Game.Entities
             }
 
             SetMap(Global.MapMgr.CreateMap(info.MapId, this));
+            UpdatePositionData();
 
             PowerType powertype = cEntry.DisplayPower;