fix error on connection lost if no reason (reason = None) (#1055)
fix error on connection lost if no reason (reason = None) (#1055)


oberstet/autobahn-python,crossbario/autobahn-python,tavendo/AutobahnPython,oberstet/autobahn-python,oberstet/autobahn-python,crossbario/autobahn-python,crossbario/autobahn-python