quiz/edit.php 題目編輯修改

1. 隨機題數選擇，預設 20 題以上時間隔 10 題，改成 15 題到 50 題間隔 5 題。

   [root@dywang moodle23]# diff -urNwbBE ../moodle/mod/quiz/edit.php mod/quiz/edit.php
   --- ../moodle/mod/quiz/edit.php	2012-06-26 01:15:22.000000000 +0800
   +++ mod/quiz/edit.php	2015-04-22 14:05:35.882172373 +0800
   @@ -88,7 +88,10 @@
                for ($i = 1; $i <= min(10, $maxrand); $i++) {
                    $randomcount[$i] = $i;
                }
   -            for ($i = 20; $i <= min(100, $maxrand); $i += 10) {
   +            for ($i = 15; $i <= min(50, $maxrand); $i += 5) {
   +                $randomcount[$i] = $i;
   +            }
   +            for ($i = 60; $i <= min(100, $maxrand); $i += 10) {
                    $randomcount[$i] = $i;
                }
            } else {