From 5e58f699a16f08f4c7fe626d82cb06985a18b851 Mon Sep 17 00:00:00 2001
From: Dan Marsden <Dan@digitalclay.co.nz>
Date: Fri, 16 Jul 2010 08:57:44 +0000
Subject: [PATCH] Calendar preferences MDL-23332 fix db call

---
 calendar/preferences.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/calendar/preferences.php b/calendar/preferences.php
index a9f139f049d9c..a221b046c95b8 100644
--- a/calendar/preferences.php
+++ b/calendar/preferences.php
@@ -7,7 +7,7 @@
 require_once($CFG->dirroot.'/calendar/preferences_form.php');
 
 $course = $site = get_site();
-if (isset($SESSION->cal_course_referer)) {
+if (!empty($SESSION->cal_course_referer)) {
     $course = $DB->get_record('course', array('id'=>$SESSION->cal_course_referer), '*', MUST_EXIST);
 }