Back-port from vl.

Back-port from vl.

Author: Volker Lendecke <vl@samba.org>
Date:   Mon Feb 11 18:36:06 2008 +0100

    Add a missing return

    If I'm not completely blind, we should return here. Not doing it here seems not
    to be a major flaw, as far as I can see we're only missing the error code. This
    might account for some of the very unhelpful NT_STATUS_UNSUCCESSFUL error
    messages people see during joins.

    All with stake in Samba client, please check!