- fixed disappearing inventory after morphing pickup

When player is picked up item that does morph, the corresponding toucher actor is changed in process
Previously, morhing item was removed from original actor leaving player's inventory in inconsistent state

https://forum.zdoom.org/viewtopic.php?t=63124

wadsrc/static/zscript/inventory/inventory.txt

@@ -509,6 +509,13 @@ class Inventory : Actor
 			// The item is placed in the inventory just long enough to be used.
 			toucher.AddInventory(self);
 			bool usegood = Use(true);
+
+			// Handle potential change of toucher/owner because of morph
+			if (usegood && self.owner)
+			{
+				toucher = self.owner;
+			}
+
 			toucher.RemoveInventory(self);
 
 			if (usegood)