From 28a94057642200ebd8eba67e0a1e386bf1530b8a Mon Sep 17 00:00:00 2001
From: Michael J Rubinsky <mrubinsk@horde.org>
Date: Tue, 21 Apr 2015 12:56:03 -0400
Subject: [PATCH] Can't use empty() in this way.

---
 kronolith/lib/Calendar/Internal.php | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/kronolith/lib/Calendar/Internal.php b/kronolith/lib/Calendar/Internal.php
index c91ea132ded..1982c51f036 100644
--- a/kronolith/lib/Calendar/Internal.php
+++ b/kronolith/lib/Calendar/Internal.php
@@ -138,7 +138,8 @@ public function caldavUrl()
      */
     public function isSystem()
     {
-        return empty($this->owner()) && ($this->_share->get('type') == Kronolith::SHARE_TYPE_USER);
+        $owner = $this->owner();
+        return empty($owner) && ($this->_share->get('type') == Kronolith::SHARE_TYPE_USER);
     }
 
     /**