From 933ac7497a82deaebc5992f2c8de67bf3c485176 Mon Sep 17 00:00:00 2001
From: Jamie Pratt <me@jamiep.org>
Date: Tue, 24 Sep 2013 17:03:36 +0700
Subject: [PATCH] MDL-41888 allow for a blank string as format to mean not to
 show stat

as in MDL-41929 which applies to older stable branches.
---
 mod/quiz/report/statistics/classes/calculated.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mod/quiz/report/statistics/classes/calculated.php b/mod/quiz/report/statistics/classes/calculated.php
index afb77399316..302b0074a23 100644
--- a/mod/quiz/report/statistics/classes/calculated.php
+++ b/mod/quiz/report/statistics/classes/calculated.php
@@ -128,7 +128,7 @@ class quiz_statistics_calculated {
 
         // The statistics.
         foreach ($todisplay as $property => $format) {
-            if (!isset($this->$property)) {
+            if (!isset($this->$property) || !$format) {
                 continue;
             }
             $value = $this->$property;