python: Inherit from object.

python: Inherit from object.

class Vlog now inherits from "object".  This is a "new style" Python
class, which isn't new at all at this point.  This was introduced back
in Python 2.2, and some Python 2 code won't work as expected without it.

Signed-off-by: Russell Bryant <russell@ovn.org>
Acked-by: Ben Pfaff <blp@ovn.org>