libsmb: Fix CID 1465656 Resource leak

libsmb: Fix CID 1465656 Resource leak

This is very likely a false positive, because Coverity does not see
that we only assign "dns_addrs" when NT_STATUS_IS_OK(status), so we
might not want this. But it is a fresh finding and looks cleaner this
way.

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 Aug  6 20:23:53 UTC 2020 on sn-devel-184