CamelNetworkService: Check for non-NULL session
CamelNetworkService: Check for non-NULL session

It can happen that the session is NULL, for example when checking
for supported authentication types, thus check for that state and
avoid actions which require valid session object.

tintou/evolution-data-server,matzipan/evolution-data-server,tintou/evolution-data-server,tintou/evolution-data-server,matzipan/evolution-data-server,matzipan/evolution-data-server,matzipan/evolution-data-server,matzipan/evolution-data-server,tintou/evolution-data-server