From be1b32d9b28faaba22253bced471bde3037ca2ff Mon Sep 17 00:00:00 2001
From: Thomas Bruederli <bruederli@kolabsys.com>
Date: Wed, 8 Jan 2014 09:49:45 +0100
Subject: [PATCH] Convert '0' values to null

---
 plugins/tasklist/tasklist.php | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/plugins/tasklist/tasklist.php b/plugins/tasklist/tasklist.php
index 840ee2e8..d7448d09 100644
--- a/plugins/tasklist/tasklist.php
+++ b/plugins/tasklist/tasklist.php
@@ -644,6 +644,9 @@ class tasklist extends rcube_plugin
         if (in_array($rec['id'], $this->collapsed_tasks))
           $rec['collapsed'] = true;
 
+        if (empty($rec['parent_id']))
+            $rec['parent_id'] = null;
+
         $this->task_titles[$rec['id']] = $rec['title'];
     }