CMedialibItem::DeleteEmpty

static function DeleteEmpty()
{
	global $DB;

	$strSql = 'SELECT MI.*,MCI.COLLECTION_ID
		FROM b_medialib_item MI
		LEFT JOIN b_medialib_collection_item MCI ON (MI.ID=MCI.ITEM_ID)
		WHERE MCI.COLLECTION_ID is null';
	$res = $DB->Query($strSql, false, "FILE: ".__FILE__."
 LINE: ".__LINE__);

	$strItems = "0";
	while($arRes = $res->Fetch())
	{
		$strItems .= ",".intval($arRes['ID']);

		if ($arRes['SOURCE_ID'] > 0) // Clean from 'b_file'
			CFile::Delete(intval($arRes['SOURCE_ID']));
	}

	// Clean from 'b_medialib_item'
	if ($strItems != "0")
		$DB->Query("DELETE FROM b_medialib_item WHERE ID in (".$strItems.")", false, "FILE: ".__FILE__."
 LINE: ".__LINE__);
}