if (__all_undef_or_equal($param{forwarded},$data->{forwarded}) or
(not defined $param{forwarded} and
defined $data->{forwarded} and not length $data->{forwarded})) {
if (__all_undef_or_equal($param{forwarded},$data->{forwarded}) or
(not defined $param{forwarded} and
defined $data->{forwarded} and not length $data->{forwarded})) {