Re-patch issue #12 with a better fix

bob/db/base/script/dbmanage.py

@@ -22,8 +22,8 @@ def main(user_input=None):
   from argparse import RawDescriptionHelpFormatter
   parser = create_parser(description=__doc__, epilog=epilog,
       formatter_class=RawDescriptionHelpFormatter)
-  if not user_input:
-    args = parser.parse_args(args=['--help'])
-  else:
-    args = parser.parse_args(args=user_input)
+  args = parser.parse_args(args=user_input)
+  if hasattr(args, 'func'):
     return args.func(args)
+  else:
+    return parser.parse_args(args=['--help'])