Error when expiry is null

[haflidi]

Using SQLALCHEMY with postgresql. One client written in angular deleted the session cookie when logout. When this happended a new entry in the session table had an expiry with null value. This caused an error in line 535 in the sessions.py file. It's very easy to fix this error. I changed the if statement in line 535 to:
if saved_session and (saved_session.expiry is None or saved_session.expiry <= datetime.utcnow()):
It would be very nice If you could correct this error in next release of flask-session

[Lxstr]

Should now be fixed thanks