s3: smbd - smb1 - fix read of deleted memory in reply_writeclose().

s3: smbd - smb1 - fix read of deleted memory in reply_writeclose().

While running smbtorture test raw.write under valgrind an "Invalid read"
was reported in methid reply_writeclose, it seems after closing a file
sometime later we try to access it again.

Signed-off-by: Noel Power <noel.power@suse.com>
Signed-off-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Andreas Schneider <asn@samba.org>
Autobuild-User(master): Jeremy Allison <jra@samba.org>
Autobuild-Date(master): Mon Mar  3 20:42:40 CET 2014 on sn-devel-104
(cherry picked from commit 04e434661fa6b5f13776f925b0a7cbadb6b6d006)

Fix bug #10554 - request backport for 'smb1 - fix read of deleted memory in
reply_writeclose()'.

Autobuild-User(v4-0-test): Karolin Seeger <kseeger@samba.org>
Autobuild-Date(v4-0-test): Fri May  2 15:39:19 CEST 2014 on sn-devel-104