From c85aea03d3d554aea893d913b0d45cb5e185de93 Mon Sep 17 00:00:00 2001
From: tjhunt <tjhunt>
Date: Mon, 10 Dec 2007 11:57:24 +0000
Subject: [PATCH] Fix notice in numerical question.

---
 question/type/numerical/questiontype.php | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/question/type/numerical/questiontype.php b/question/type/numerical/questiontype.php
index 8a07800daf..f4449591dc 100644
--- a/question/type/numerical/questiontype.php
+++ b/question/type/numerical/questiontype.php
@@ -267,7 +267,8 @@ class question_numerical_qtype extends question_shortanswer_qtype {
 
     function get_correct_responses(&$question, &$state) {
         $correct = parent::get_correct_responses($question, $state);
-        if ($correct[''] != '*' && $unit = $this->get_default_numerical_unit($question)) {
+        $unit = $this->get_default_numerical_unit($question);
+        if (isset($correct['']) && $correct[''] != '*' && $unit) {
             $correct[''] .= ' '.$unit->unit;
         }
         return $correct;
-- 
2.39.5