From 4a2bc331fbc5f9cfb85becda7b94a668e1453609 Mon Sep 17 00:00:00 2001
From: David Knuplesch <david.knuplesch@uni-ulm.de>
Date: Tue, 12 Dec 2017 11:44:44 +0100
Subject: [PATCH] MDL-60415 mod_lti: avoid confusing error-message

---
 mod/lti/locallib.php | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/mod/lti/locallib.php b/mod/lti/locallib.php
index 32a95661005..3bf73d3be15 100644
--- a/mod/lti/locallib.php
+++ b/mod/lti/locallib.php
@@ -1131,6 +1131,9 @@ EOD;
  * @return Array of enabled capabilities
  */
 function lti_get_enabled_capabilities($tool) {
+    if (!isset($tool)) {
+        return array();
+    }
     if (!empty($tool->enabledcapability)) {
         $enabledcapabilities = explode("\n", $tool->enabledcapability);
     } else {