Import of Blackboard 5 questions error due to php5 variable handling (replace $q = $defaultq with $q = clone $defaultq)

PHP5 seems to treat variable assignment in a fundamentally different way when copying a variable. ex.: $question = $defaultq in questions/format/blackboard/format.php
$defaultq is passed in as a parameter to several functions in format.php

the solution seems to be making a slight adjustment to the line intended to make a copy of the default question passed in.
$question = clone $defaultq; // fixed in several places