mod_c2s_limit_sessions: Fix check when it's the first connection Creation of the sessions[username] entry happens after the "pre-resource-bind" event, before the "resource-bind" event. Thus, for a users first connection, it may not exist. This led to an 'attempt to index a nil value' error, fixed here.

module:depends("smacks");

module:hook("smacks-ack-delayed", function (event)
	if event.origin.type == "s2sin" or event.origin.type == "s2sout" then
		event.origin:close("connection-timeout");
		return true;
	end
end);