Fix bug in old create temp SMB request. Only use VFS functions.

Signed-off-by: Jeremy Allison <jra@samba.org>
Reviewed-by: David Disseldorp <ddiss@samba.org>

Autobuild-User(master): David Disseldorp <ddiss@samba.org>
Autobuild-Date(master): Sat Apr 20 21:13:36 CEST 2013 on sn-devel-104