From a10b772516590b7b1b060b50babad1c3ee5c8fae Mon Sep 17 00:00:00 2001
From: Ralf Becker <RalfBecker@outdoor-training.de>
Date: Tue, 9 Mar 2021 08:56:14 +0200
Subject: [PATCH] fix PHP Notice: Undefined offset

---
 api/src/Categories.php | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/api/src/Categories.php b/api/src/Categories.php
index ab9b962dd8..9cbbb46e24 100644
--- a/api/src/Categories.php
+++ b/api/src/Categories.php
@@ -557,8 +557,8 @@ class Categories
 		$owner_grant = false;
 		foreach(explode(',',$category['owner']) as $owner)
 		{
-			$owner_grant = $owner_grant || (is_array($this->grants) && ($this->grants[$owner] & $needed) &&
-				($category['access'] == 'public' ||  ($this->grants[$owner] & Acl::PRIVAT)));
+			$owner_grant = $owner_grant || (is_array($this->grants) && !empty($this->grants[$owner]) && ($this->grants[$owner] & $needed) &&
+				($category['access'] === 'public' ||  ($this->grants[$owner] & Acl::PRIVAT)));
 		}
 		return $acl_grant && $owner_grant;
 	}