pidl: Recent Perl warns about "defined(@var)" constructs.

Signed-off-by: Jelmer Vernooij <jelmer@samba.org>

Autobuild-User(master): Jelmer Vernooij <jelmer@samba.org>
Autobuild-Date(master): Sat May 25 18:10:53 CEST 2013 on sn-devel-104
winbind: Print error code on connection error in ping_dc

For debugging, it is useful to include the error code in the message.

Signed-off-by: Christof Schmitt <christof.schmitt@us.ibm.com>

Reviewed-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Michael Adam <obnox@samba.org>

Autobuild-User(master): Michael Adam <obnox@samba.org>
Autobuild-Date(master): Sat May 25 23:11:23 CEST 2013 on sn-devel-104