s3:vfs:aio_pthread: use smbXsrv_connection for schedule_deferred_open_message_smb

s3:vfs:aio_pthread: use smbXsrv_connection for schedule_deferred_open_message_smb

This fixes an incompatible pointer warning which uncovered
a real bug. This caller was missed when converting the function.

This fix is only temporary, since we use fsp->sconn->client->connections
which is supposed to be the start of the list of transport connections
by a given client treated by this smbd process. Currently there is only
one such connection, but with multi-channel there might be more. So
we will need to improve this in the future.

Signed-off-by: Michael Adam <obnox@samba.org>
Reviewed-by: Volker Lendecke <vl@samba.org>
Autobuild-User(master): Volker Lendecke <vl@samba.org>
Autobuild-Date(master): Thu Oct 23 23:10:35 CEST 2014 on sn-devel-104