From 8b40604ab99da1974e5ece60c46ad2b01a1b65b0 Mon Sep 17 00:00:00 2001
From: Alistair Spark <aspark21@users.noreply.github.com>
Date: Tue, 11 Aug 2015 10:13:48 +0100
Subject: [PATCH] MDL-50391 format_singleactivity: fix LTI Tool opens in
 existing window

---
 mod/lti/mod_form.php | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/mod/lti/mod_form.php b/mod/lti/mod_form.php
index 3652b4757879b..1df25e30fa4bb 100644
--- a/mod/lti/mod_form.php
+++ b/mod/lti/mod_form.php
@@ -75,10 +75,12 @@ public function definition() {
         $mform->setAdvanced('introeditor');
 
         // Display the label to the right of the checkbox so it looks better & matches rest of the form.
-        $coursedesc = $mform->getElement('showdescription');
-        if (!empty($coursedesc)) {
-            $coursedesc->setText(' ' . $coursedesc->getLabel());
-            $coursedesc->setLabel('&nbsp');
+        if ($mform->elementExists('showdescription')) {
+           $coursedesc = $mform->getElement('showdescription');
+           if (!empty($coursedesc)) {
+               $coursedesc->setText(' ' . $coursedesc->getLabel());
+               $coursedesc->setLabel('&nbsp');
+           }
         }
 
         $mform->setAdvanced('showdescription');