Core/Scripts: Fix a logic fail that overriden the script of an entity that changed entry

Port From (https://github.com/TrinityCore/TrinityCore/commit/649009552065940ab0f03d905b945f1a16d603bb)

Source/Game/Entities/Creature/Creature.cs

@@ -2418,7 +2418,11 @@ namespace Game.Entities
         {
             CreatureData creatureData = GetCreatureData();
             if (creatureData != null)
-                return creatureData.ScriptId;
+            {
+                uint scriptId = creatureData.ScriptId;
+                if (scriptId != 0)
+                    return scriptId;
+            }
 
             return Global.ObjectMgr.GetCreatureTemplate(GetEntry()) != null ? Global.ObjectMgr.GetCreatureTemplate(GetEntry()).ScriptID : 0;
         }

Source/Game/Entities/GameObject/GameObject.cs

@@ -2080,7 +2080,11 @@ namespace Game.Entities
         {
             GameObjectData gameObjectData = GetGoData();
             if (gameObjectData != null)
-                return gameObjectData.ScriptId;
+            {
+                uint scriptId = gameObjectData.ScriptId;
+                if (scriptId != 0)
+                    return scriptId;
+            }
 
             return GetGoInfo().ScriptId;
         }

Source/Game/Globals/ObjectManager.cs

@@ -3325,8 +3325,6 @@ namespace Game
                 data.phaseGroup = result.Read<uint>(25);
                 data.terrainSwapMap = result.Read<int>(26);
                 data.ScriptId = GetScriptId(result.Read<string>(27));
-                if (data.ScriptId == 0)
-                    data.ScriptId = cInfo.ScriptID;
 
                 var mapEntry = CliDB.MapStorage.LookupByKey(data.mapid);
                 if (mapEntry == null)
@@ -4121,8 +4119,6 @@ namespace Game
                 }
 
                 data.ScriptId = GetScriptId(result.Read<string>(21));
-                if (data.ScriptId == 0)
-                    data.ScriptId = gInfo.ScriptId;
 
                 if (Math.Abs(data.orientation) > 2 * MathFunctions.PI)
                 {