fixed error img path

cgi/autodoc.fcgi

@@ -202,14 +202,12 @@ sub get_page_image {
 		$wh = 'h';
 		$size = $qs->{maxWidth};
 	}
-	print STDERR "id=$id\n";
-	print STDERR "wh=$wh\n";
-	print STDERR "size=$size\n";
 	my $src;
 	my $dst;
 
 	if ( !defined $id ) {
-		$src = $conf->{path}{error_img};
+		$src = sprintf("%s/%s",
+			$conf->{path}{global}, $conf->{path}{error_img});
 	}
 	else {
 		$src = sprintf("%s/%s/%s.jpeg",