Fix errors found by pychecker
diff --git a/Lib/bsddb/dbtables.py b/Lib/bsddb/dbtables.py
index 369db43..492d5fd 100644
--- a/Lib/bsddb/dbtables.py
+++ b/Lib/bsddb/dbtables.py
@@ -32,6 +32,12 @@
     # For Python 2.3
     from bsddb.db import *
 
+# XXX(nnorwitz): is this correct? DBIncompleteError is conditional in _bsddb.c
+try:
+    DBIncompleteError
+except NameError:
+    class DBIncompleteError(Exception):
+        pass
 
 class TableDBError(StandardError):
     pass