From 053a640b87ea078e6c31a1929aa797ef1966176a Mon Sep 17 00:00:00 2001
From: Aleksander Machniak <machniak@kolabsys.com>
Date: Mon, 14 Oct 2013 15:04:00 +0200
Subject: [PATCH] Fix PHP warning when _sql_where() is callend with NULL as an
 argument

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

diff --git a/plugins/libkolab/lib/kolab_storage_cache.php b/plugins/libkolab/lib/kolab_storage_cache.php
index 8e4e19c4..9a16799e 100644
--- a/plugins/libkolab/lib/kolab_storage_cache.php
+++ b/plugins/libkolab/lib/kolab_storage_cache.php
@@ -494,7 +494,7 @@ class kolab_storage_cache
     protected function _sql_where($query)
     {
         $sql_where = '';
-        foreach ($query as $param) {
+        foreach ((array) $query as $param) {
             if (is_array($param[0])) {
                 $subq = array();
                 foreach ($param[0] as $q) {