From cad81f2b3cb798307f917bae4441627890ce18ab Mon Sep 17 00:00:00 2001
From: Dan Marsden <dan@danmarsden.com>
Date: Fri, 28 Apr 2017 13:21:34 +1200
Subject: [PATCH] fix php warning in php 5.6

---
 renderer.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/renderer.php b/renderer.php
index 6b5180c..f0549a7 100644
--- a/renderer.php
+++ b/renderer.php
@@ -1464,7 +1464,7 @@ class mod_attendance_renderer extends plugin_renderer_base {
         foreach ($prefdata->statuses as $st) {
             $emptyacronym = '';
             $emptydescription = '';
-            if (!empty(($prefdata->errors[$st->id]))) {
+            if (!empty($prefdata->errors) && !empty(($prefdata->errors[$st->id]))) {
                 if (empty($prefdata->errors[$st->id]['acronym'])) {
                     $emptyacronym = $this->construct_notice(get_string('emptyacronym', 'mod_attendance'), 'notifyproblem');
                 }