MDL-28522 Choice : View reports now correctly shows unanswered column…

… - thanks to Marcus Boon for the patch

mod/choice/report.php

@@ -215,6 +215,11 @@
         }
         exit;
     }
+    // Show those who haven't answered the question.
+    if (!empty($choice->showunanswered)) {
+        $choice->option[0] = get_string('notanswered', 'choice');
+        $choice->maxanswers[0] = 0;
+    }
 
     $results = prepare_choice_show_results($choice, $course, $cm, $users);
     $renderer = $PAGE->get_renderer('mod_choice');