From 5e0b6acd8012a7442b6ac805e38450dc14bb9672 Mon Sep 17 00:00:00 2001
From: pmoxhay <pmoxhay@earthlink.net>
Date: Wed, 17 Jun 2009 01:08:35 +0000
Subject: Minor bug fix in MovableObject.

---
diff --git a/movableobject.py b/movableobject.py
index 334153f..9dc6e2b 100644
--- a/movableobject.py
+++ b/movableobject.py
@@ -282,8 +282,9 @@ class MovableObject(Object):
                 self.move(self.pos + Vector(GRID_SIZE, 0))
             elif key_name == 'BackSpace' or key_name == 'KP_Page_Down':
                 #print "BackSpace pressed, try to stop the drag"
-                self.drop_origin.remove_object(self)
-                return
+                if self.drop_origin:
+                    self.drop_origin.remove_object(self)
+                    return
                 
     # Default implementation which may be overridden by derived objects.
     def is_in_container(self):
--
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