From 1170363a29bf6bee64faef02cc603f6c54756f45 Mon Sep 17 00:00:00 2001
From: onli <onli@paskuda.biz>
Date: Sun, 27 Jun 2021 23:10:14 +0200
Subject: [PATCH] Fix: Entries could not be saved if blog had no category

---
 include/functions_entries.inc.php | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/include/functions_entries.inc.php b/include/functions_entries.inc.php
index c1315f02..a5357604 100644
--- a/include/functions_entries.inc.php
+++ b/include/functions_entries.inc.php
@@ -1364,9 +1364,9 @@ function serendipity_updertEntry($entry) {
     $categories = $entry['categories'];
     unset($entry['categories']);
 
-    if (isset($entry['had_categories'])) {
+    if (array_key_exists('had_categories', $entry)) {
         $had_categories = $entry['had_categories'];
-        unset($entry['had_categories']);
+        unset($entry['had_categories']);        
     }
 
     $newEntry = 0;