fixes an undefined index when getAccessList returns an empty array

- [] is a valid return value that should be honored as having no access

Signed-off-by: Arthur Schiwon <blizzz@arthur-schiwon.de>

1 files changed, 1 insertions, 1 deletions

diff --git a/apps/workflowengine/lib/Entity/File.php b/apps/workflowengine/lib/Entity/File.php
index 2c8701f0378..3f09fcd24a1 100644
--- a/apps/workflowengine/lib/Entity/File.php
+++ b/apps/workflowengine/lib/Entity/File.php
@@ -141,7 +141,7 @@ class File implements IEntity, IDisplayText, IUrl, IIcon, IContextPortation {
 				return true;
 			}
 			$acl = $this->shareManager->getAccessList($node, true, true);
-			return array_key_exists($uid, $acl['users']);
+			return isset($acl['users']) && array_key_exists($uid, $acl['users']);
 		} catch (NotFoundException $e) {
 			return false;
 		}