[svn r13541] fix a bug when deleting someone from the course of the session

main/admin/session_course_user_list.php

@@ -18,6 +18,7 @@ $course_code=trim(stripslashes($_GET['course_code']));
 $page=intval($_GET['page']);
 $action=$_REQUEST['action'];
 $sort=in_array($_GET['sort'],array('lastname','firstname','username'))?$_GET['sort']:'lastname';
+$idChecked = (is_array($_GET['idChecked']) ? $_GET['idChecked'] : (is_array($_POST['idChecked']) ? $_POST['idChecked'] : null));
 
 $result=api_sql_query("SELECT name,title FROM $tbl_session,$tbl_course WHERE id='$id_session' AND code='".addslashes($course_code)."'",__FILE__,__LINE__);