From f32ec4b704d588ecf9c7a47cb3b37d8202eca0e3 Mon Sep 17 00:00:00 2001
From: Andrew McMillan <andrew@morphoss.com>
Date: Mon, 19 Mar 2012 12:31:54 +1300
Subject: [PATCH] Don't try and produce a sync_token for the root collection.

---
 inc/DAVResource.php | 1 +
 1 file changed, 1 insertion(+)

diff --git a/inc/DAVResource.php b/inc/DAVResource.php
index 49eaae8e..a5c9a90d 100644
--- a/inc/DAVResource.php
+++ b/inc/DAVResource.php
@@ -1264,6 +1264,7 @@ EOQRY;
    */
   function sync_token() {
     if ( $this->IsPrincipal() ) return null;
+    if ( $this->collection_id() == 0 ) return null;
     if ( !isset($this->sync_token) ) { 
       $sql = 'SELECT sync_token FROM sync_tokens WHERE collection_id = :collection_id ORDER BY sync_token DESC LIMIT 1';
       $params = array( ':collection_id' => $this->collection_id());
-- 
2.11.4.GIT