From 57ed29ef684f47b3fe2f0982241072880f13213a Mon Sep 17 00:00:00 2001
From: Aleksander Machniak <machniak@kolabsys.com>
Date: Wed, 2 Aug 2023 16:03:38 +0200
Subject: [PATCH] Fix PHP8 warning

---
 plugins/libkolab/lib/kolab_storage.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/plugins/libkolab/lib/kolab_storage.php b/plugins/libkolab/lib/kolab_storage.php
index d4307a6c..893af60b 100644
--- a/plugins/libkolab/lib/kolab_storage.php
+++ b/plugins/libkolab/lib/kolab_storage.php
@@ -897,7 +897,7 @@ class kolab_storage
         // then the metadata will already contain all folder names and we can avoid the LIST below.
         if (!$subscribed && $filter != 'mail' && $prefix == '*') {
             foreach ($folderdata as $folder => $type) {
-                if (!preg_match($regexp, $type)) {
+                if (!preg_match($regexp, (string) $type)) {
                     unset($folderdata[$folder]);
                 }
             }