Fix for incorrect order of question numbers when downloading detailed

results as Excel spreadsheet. Merged from STABLE. (SE)

mod/quiz/report/overview/report.php

@@ -235,8 +235,8 @@ class quiz_report extends quiz_default_report {
                 $headers[] = get_string('grade', 'quiz').'/'.$quiz->grade;
             }
             if($detailedmarks) {
-                foreach ($questions as $question) {
-                    $headers[] = '#'.$question->number;
+                foreach ($questionids as $key=>$id) {
+                    $headers[] = '#'.$questions[$id]->number;
                 }
             }
             $colnum = 0;