2-24-16 build changes

Zennysoft.Game.Ma/src/item_rescue/ItemRescue.cs

@@ -10,6 +10,8 @@ public partial class ItemRescue : Area3D
 {
   public override void _Notification(int what) => this.Notify(what);
 
+  private bool _transferUsed = false;
+
   public void Initialize()
   {
     BodyEntered += OnItemRescueEntered;
@@ -24,10 +26,12 @@ public partial class ItemRescue : Area3D
       thrownItem.RescueItem();
 
     BodyEntered -= OnItemRescueEntered;
+    _transferUsed = true;
   }
 
   public void OnExitTree()
   {
-    BodyEntered -= OnItemRescueEntered;
+    if (!_transferUsed)
+      BodyEntered -= OnItemRescueEntered;
   }
 }