##
$$redirect = $formdata->{redirect} if ($formdata->{required} ne "");
##
##
# sets unless $formdata->{redirect} is
# a) undefined b) "" or c) 0
$$redirect = $formdata->{redirect} if $formdata->{required};
# this sets it only if $formdata->{redirect} is defined
# ($formdata->{redirect} may be "" or 0 if already
# initialized to that value)
$$redirect = $formdata->{redirect} if defined($formdata->{required};