Also raise a KeyError when object creation has been undone.

git-svn-id: https://svn.erp5.org/repos/neo/trunk@1856 71dcc9de-d417-0410-9af5-da40c76e7ee4

neo/client/app.py

@@ -924,7 +924,8 @@ class Application(object):
         if not isinstance(self.local_var.history, tuple):
             raise NEOStorageError('history failed')
 
-        if self.local_var.history[1] == []:
+        if self.local_var.history[1] == [] or \
+            self.local_var.history[1][0][1] == 0:
             # KeyError expected if no history was found
             # XXX: this may requires an error from the storages
             raise KeyError