From d1b69e6af13aea6444a515e20029b6b50e688e17 Mon Sep 17 00:00:00 2001
From: Lucas Cimon <lucas.cimon@gmail.com>
Date: Sun, 6 Aug 2017 21:26:37 +0200
Subject: [PATCH] Adding missing empty() as spotted in #889 code review

---
 index.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/index.php b/index.php
index 9025df58..82a92473 100644
--- a/index.php
+++ b/index.php
@@ -1021,7 +1021,7 @@ function renderPage($conf, $pluginManager, $LINKSDB, $history)
 
     // -------- User wants to see only untagged links (toggle)
     if (isset($_GET['untaggedonly'])) {
-        $_SESSION['untaggedonly'] = !$_SESSION['untaggedonly'];
+        $_SESSION['untaggedonly'] = !empty($_SESSION['untaggedonly']);
 
         if (! empty($_SERVER['HTTP_REFERER'])) {
             $location = generateLocation($_SERVER['HTTP_REFERER'], $_SERVER['HTTP_HOST'], array('untaggedonly'));