Hi,

I've found a notice from php. Just a undefined variable.

Symptoms / How to reproduce

After creating a forum and a discussion, on the discussion page, when we click on the link to return on the forum (the link beginning by "«"), we have a beautiful notice from php :

Notice: Undefined variable: cm in /home/pedagroot/Documents/moodleBase/mod/hsuforum/view.php on line 59

Possible fixes

1. (Simplest) Replace the `!$cm` by `empty($cm)` (line 59)
2. (Better) Remove the `if` lines 59 to 61, then add between the actual line 40 and 41 the following lines :

    if (!$cm = get_coursemodule_from_instance("forumimproved", $forum->id, $course->id)) {

        print_error('missingparameter');

    }