missing jpeg suffix for conversion

cgi/autodoc.fcgi

@@ -247,7 +247,7 @@ sub get_page_image {
 			$conf->{path}{global}, $conf->{path}{error_img});
 	}
 	else {
-		$src = sprintf("%s/%s/%s",
+		$src = sprintf("%s/%s/%s.jpeg",
 			$conf->{path}{global}, $conf->{path}{original}, $id);
 	}