From 8387614051414bcd9e50dddcfdebc2e002b13468 Mon Sep 17 00:00:00 2001
From: Damyon Wiese <damyon@moodle.com>
Date: Mon, 24 Oct 2016 10:03:04 +0800
Subject: [PATCH] MDL-55074 theme_boost: Undefined variable in perf footer

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

diff --git a/lib/moodlelib.php b/lib/moodlelib.php
index c1ffdd5f71b..b9c10aebed9 100644
--- a/lib/moodlelib.php
+++ b/lib/moodlelib.php
@@ -8887,9 +8887,10 @@ function get_performance_info() {
     $info = array();
     $info['txt']  = me() . ' '; // Holds log-friendly representation.
 
+    $info['html'] = '';
     if (!empty($CFG->themedesignermode)) {
         // Attempt to avoid devs debugging peformance issues, when its caused by css building and so on.
-        $info['html'] = '<p><strong>Warning: Theme designer mode is enabled.</strong></p>';
+        $info['html'] .= '<p><strong>Warning: Theme designer mode is enabled.</strong></p>';
     }
     $info['html'] .= '<ul class="list-unstyled m-l-1">';         // Holds userfriendly HTML representation.