ccan: Fix calling memset with zero length parameter

Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Andreas Schneider <asn@samba.org>

Autobuild-User(master): Andreas Schneider <asn@cryptomilk.org>
Autobuild-Date(master): Thu Jul 11 16:55:49 CEST 2013 on sn-devel-104
srvsvc: Use a symbolic constant where we have one

Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
smbd: Fix a 100% loop at shutdown time

In the destructor of fsp->aio_requests[0] we put another request into
fsp->aio_requests[0]. Don't overwrite that with TALLOC_FREE.

Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>

Autobuild-User(master): Jeremy Allison <jra@samba.org>
Autobuild-Date(master): Thu Jul 11 20:56:42 CEST 2013 on sn-devel-104