Pull X random questions doesn't update properly

Hello again,

I’ve stumbled upon another minor bug – whenever I update a Quiz, the setting for the number of questions to pull randomly gets reset to 1.

The problem seems to be in controllers/exam.php on line 60. Updating the line to this fixed the issue for me:

$pull_random = empty($_POST['pull_random']) ? 0 : $_POST['pull_random'];

Thank you for your work and the plugin!

https://wordpress.org/plugins/watu/