* @return object see mailboxes class
* @since 1.5.0
*/
-function sqimap_fill_mailbox_tree($mbx_ary, $mbxs=false,$imap_stream) {
+function sqimap_fill_mailbox_tree($mbx_ary, $mbxs=false,$imap_stream=null) {
global $data_dir, $username, $list_special_folders_first,
$folder_prefix, $trash_folder, $sent_folder, $draft_folder,
$move_to_trash, $move_to_sent, $save_as_draft,