- my $header_height = 2 * $title_font_height if ($opts->{title});
- my $footer_height = 2 * $font_height if ($pdfopts->{number});
+ my $header_height = $opts->{title} ? 2 * $title_font_height : undef;
+ my $footer_height = $pdfopts->{number} ? 2 * $font_height : undef;