[svn r12168] Added check to avoid warnings breaking workflow in test mode

main/newscorm/learnpath.class.php

@@ -1776,6 +1776,8 @@ class learnpath {
 	    	$index = 0;
 	    	while (!empty($this->ordered_items[$index]) 
 	    			AND
+	    			is_a($this->items[$this->ordered_items[$index]],'learnpathItem')
+	    		AND 
 	    		(
 	    			$this->items[$this->ordered_items[$index]]->get_type() == 'dir'
 	    		  	OR $this->items[$this->ordered_items[$index]]->get_type() == 'dokeos_chapter'