fix landing page (errstr was not used correctly)

1 files changed, 4 insertions, 1 deletions

diff --git a/cgi/index.pl b/cgi/index.pl
index 118df7d..8ddd0b9 100644
--- a/cgi/index.pl
+++ b/cgi/index.pl
@@ -76,9 +76,12 @@ sub handle_request {
 
 	my $no_lines = $self->param('no_lines');
 	my $frontend = $self->param('frontend') // 'png';
+	my $errstr;
 
-	my (undef, $errstr) = get_results( $self->param('backend') // $default{backend},
+	if ($city and $stop) {
+		(undef, $errstr) = get_results( $self->param('backend') // $default{backend},
 		$city, $stop);
+	}
 
 	if ( not $no_lines or $no_lines < 1 or $no_lines > 40 ) {
 		$no_lines = $default{no_lines};