From dec774fc738a043ea1625efcaf89479a32815194 Mon Sep 17 00:00:00 2001
From: Aleksander Machniak <alec@alec.pl>
Date: Wed, 4 May 2016 10:40:49 +0200
Subject: [PATCH] Fix PHP Fatal error: Call to a member function
 get_hierarchy_delimiter() on a non-object (T1252)

---
 plugins/libkolab/lib/kolab_storage.php | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/plugins/libkolab/lib/kolab_storage.php b/plugins/libkolab/lib/kolab_storage.php
index da74c007..248752e5 100644
--- a/plugins/libkolab/lib/kolab_storage.php
+++ b/plugins/libkolab/lib/kolab_storage.php
@@ -964,6 +964,10 @@ class kolab_storage
      */
     public static function folder_hierarchy($folders, &$tree = null)
     {
+        if (!self::setup()) {
+            return array();
+        }
+
         $_folders = array();
         $delim    = self::$imap->get_hierarchy_delimiter();
         $other_ns = rtrim(self::namespace_root('other'), $delim);