answer '0' is a valid answer for a numeric question.

diff --git a/question/type/numerical/edit_numerical_form.php b/question/type/numerical/edit_numerical_form.php
index a40acf349c4581f5396116bafb12bf258ab29851..f43ce2cf14f602b09891f8a3c3bfb13d55ca98f3 100644 (file)
--- a/question/type/numerical/edit_numerical_form.php
+++ b/question/type/numerical/edit_numerical_form.php
@@ -110,7 +110,7 @@ class question_edit_numerical_form extends question_edit_form {
         $answercount = 0;
         foreach ($answers as $answer){
             $trimmedanswer = trim($answer);
-            if (!empty($trimmedanswer)){
+            if ($trimmedanswer!=''){
                 $answercount++;
             }
         }