In class bsdTableDB, add class variables db and env (set to None) to
prevent close() called from __del__ from bombing out when __init__()
fails early.
diff --git a/Lib/bsddb/dbtables.py b/Lib/bsddb/dbtables.py
index 4841c28..1409eb1 100644
--- a/Lib/bsddb/dbtables.py
+++ b/Lib/bsddb/dbtables.py
@@ -113,6 +113,11 @@
 
 
 class bsdTableDB :
+
+    # Save close() from bombing out if __init__() failed
+    db = None
+    env = None
+
     def __init__(self, filename, dbhome, create=0, truncate=0, mode=0600, recover=0, dbflags=0) :
         """bsdTableDB.open(filename, dbhome, create=0, truncate=0, mode=0600)
         Open database name in the dbhome BerkeleyDB directory.