From dfcaa2450c9357d172b10955f2ce84947528712b Mon Sep 17 00:00:00 2001
From: Tim Hunt <T.J.Hunt@open.ac.uk>
Date: Thu, 20 Feb 2014 11:44:28 +0000
Subject: [PATCH] MDL-44288 qtype_calculatedsimple fix validation notice.

The notice happend if you clicked Save changes before Find the wild
cards {x..} present in the correct answer formulas.
---
 .../type/calculatedsimple/edit_calculatedsimple_form.php   | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/question/type/calculatedsimple/edit_calculatedsimple_form.php b/question/type/calculatedsimple/edit_calculatedsimple_form.php
index 298547d15dc..eb3b13a47b0 100644
--- a/question/type/calculatedsimple/edit_calculatedsimple_form.php
+++ b/question/type/calculatedsimple/edit_calculatedsimple_form.php
@@ -585,7 +585,12 @@ class qtype_calculatedsimple_edit_form extends qtype_calculated_edit_form {
 
     public function validation($data, $files) {
         $errors = parent::validation($data, $files);
-        $numbers = $data['number'];
+
+        if (array_key_exists('number', $data)) {
+            $numbers = $data['number'];
+        } else {
+            $numbers = array();
+        }
         foreach ($numbers as $key => $number) {
             if (! is_numeric($number)) {
                 if (stristr($number, ',')) {