mod_http_muc_log: Fix error in js when displaying presence is disabled When the form is hidden, attempting to index forms[0] throws an error, however this is harmless since the script is finished by that point.

module:set_global();

local log = _G.log;

module:add_timer(60-os.date("%S"), function (now)
	log("info", "-- MARK --");
	return 90 - ((now + 30) % 60);
end);