$placeinhead conflict in course/listusers.php

[MathTV]

The $placeinhead variable is overwritten on line 461 (as seen in 5577069):

$placeinhead = "<script type=\"text/javascript\">";

Prior versions of the file appended to this variable:

$placeinhead .= "<script type=\"text/javascript\">";

This problem was introduced in 0823bb4

The result is that the javascript/jquery.validate.min.js file is not included.