From eff044092c104f321de3cb754f8fc5f4e7106cbc Mon Sep 17 00:00:00 2001
From: Walter Bender <walter@walter-laptop.(none)>
Date: Thu, 25 Feb 2010 02:45:48 +0000
Subject: fixed restore of null block corner case

---
diff --git a/tawindow.py b/tawindow.py
index a766f4c..46644dc 100644
--- a/tawindow.py
+++ b/tawindow.py
@@ -1115,7 +1115,10 @@ class TurtleArtWindow():
         for b in blocks:
             if self._collapsed(b):
                 self._collapse_stack(self._find_sandwich_top(b))
-        return blocks[0]
+        if len(blocks) > 0:
+            return blocks[0]
+        else:
+            return None
 
     """
     Adjust the dock x,y positions
--
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