From c53551ab2bb8786305f04379bb72687996666761 Mon Sep 17 00:00:00 2001
From: Ralf Becker <RalfBecker@outdoor-training.de>
Date: Wed, 20 Oct 2021 15:03:41 +0200
Subject: [PATCH] fix PHP 8.0 error: Unsupported operand types: null + array

---
 preferences/inc/class.preferences_settings.inc.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/preferences/inc/class.preferences_settings.inc.php b/preferences/inc/class.preferences_settings.inc.php
index c9636b19c6..fb286e8e55 100644
--- a/preferences/inc/class.preferences_settings.inc.php
+++ b/preferences/inc/class.preferences_settings.inc.php
@@ -412,7 +412,7 @@ class preferences_settings
 					continue 2;
 
 				case 'notify':
-					$vars = $GLOBALS['egw']->preferences->vars;
+					$vars = $GLOBALS['egw']->preferences->vars ?? [];
 					if (is_array($setting['values'])) $vars += $setting['values'];
 					$GLOBALS['egw']->preferences->{$attribute}[$appname][$setting['name']] =
 						$GLOBALS['egw']->preferences->lang_notify($GLOBALS['egw']->preferences->{$attribute}[$appname][$setting['name']], $vars);