SessionID.SessionQualifier check in FileLog should use SessionID.IsSet instead of checking length (it may be null if manually created)
SessionID.SessionQualifier check in FileStore should use SessionID.IsSet instead of checking length (it may be null if manually created)
Message.SetSessionID should use SessionID.IsSet(...) instead of ... != SessionID.NOT_SET
Merge branch 'bugfix' of github.com:akamyshanov/quickfixn into isset
credit for #275
dumb
Merge pull request #289 from connamara/isset

SessionID.IsSet() should be used instead of !=SessionID.NOT_SET