Some cleanups. (might break build for scripts as they are a WIP)

Source/Game/Entities/Player/CollectionManager.cs

@@ -237,7 +237,7 @@ namespace Game.Entities
         public void UpgradeHeirloom(uint itemId, uint castItem)
         {
             Player player = _owner.GetPlayer();
-            if (!player)
+            if (player == null)
                 return;
 
             HeirloomRecord heirloom = Global.DB2Mgr.GetHeirloomByItemId(itemId);
@@ -275,7 +275,7 @@ namespace Game.Entities
         public void CheckHeirloomUpgrades(Item item)
         {
             Player player = _owner.GetPlayer();
-            if (!player)
+            if (player == null)
                 return;
 
             // Check already owned heirloom for upgrade kits
@@ -292,7 +292,7 @@ namespace Game.Entities
                 HeirloomRecord heirloomDiff;
                 while ((heirloomDiff = Global.DB2Mgr.GetHeirloomByItemId(heirloomItemId)) != null)
                 {
-                    if (player.GetItemByEntry(heirloomDiff.ItemID))
+                    if (player.GetItemByEntry(heirloomDiff.ItemID) != null)
                         newItemId = heirloomDiff.ItemID;
 
                     HeirloomRecord heirloomSub = Global.DB2Mgr.GetHeirloomByItemId(heirloomDiff.StaticUpgradedItemID);
@@ -372,7 +372,7 @@ namespace Game.Entities
         public bool AddMount(uint spellId, MountStatusFlags flags, bool factionMount = false, bool learned = false)
         {
             Player player = _owner.GetPlayer();
-            if (!player)
+            if (player == null)
                 return false;
 
             MountRecord mount = Global.DB2Mgr.GetMount(spellId);
@@ -420,7 +420,7 @@ namespace Game.Entities
         void SendSingleMountUpdate(uint spellId, MountStatusFlags mountStatusFlags)
         {
             Player player = _owner.GetPlayer();
-            if (!player)
+            if (player == null)
                 return;
 
             AccountMountUpdate mountUpdate = new();
@@ -592,7 +592,7 @@ namespace Game.Entities
             if (itemTemplate == null)
                 return false;
 
-            if (!_owner.GetPlayer())
+            if (_owner.GetPlayer() == null)
                 return false;
 
             if (_owner.GetPlayer().CanUseItem(itemTemplate) != InventoryResult.Ok)