fixed issue 1072

VERSION

@@ -1 +1 @@
-Version 2.0.9 (2012-10-07 10:12:01) dev
+Version 2.0.9 (2012-10-07 10:13:16) dev

gluon/dal.py

@@ -521,7 +521,7 @@ class ConnectionPool(object):
     @staticmethod
     def close_all_instances(action):
         """ to close cleanly databases in a multithreaded environment """
-        db_group = getattr(THREAD_LOCAL,'db_instances',{}).items()
+        dbs = getattr(THREAD_LOCAL,'db_instances',{}).items()
         for db_uid, db_group in dbs:
             for db in db_group:
                 db._adapter.close(action)