gitweb: git_print_log: signoff line is non-empty line

This correct minor error in git_print_log that didn't add final empty
line when requested, if commit log ended with signoff.

Signed-off-by: Jakub Narebski <jnareb@gmail.com>
Signed-off-by: Junio C Hamano <junkio@cox.net>

gitweb/gitweb.perl

@@ -1407,6 +1407,7 @@ sub git_print_log ($;%) {
 	foreach my $line (@$log) {
 		if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
 			$signoff = 1;
+			$empty = 0;
 			if (! $opts{'-remove_signoff'}) {
 				print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
 				next;