This went unnoticed so long as we don't use -Wc++-compat
and gensec_update_ev() used the sync update() hook for all
NTLMSSP and Kerberos.

BUG: https://bugzilla.samba.org/show_bug.cgi?id=12788



Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
(cherry picked from commit 31691963)