rem: else
add: else if (mtu != -1)
context: ipro1000_read_settings(ipro1000_device *device){	void *handle;	const char *param;	int mtu;		handle = load_driver_settings("ipro1000");	if (!handle)		return;		param = get_driver_parameter(handle, "mtu", "0", "0");	mtu = atoi(param);	if (mtu >= 50 && mtu <= 1500)		device->maxframesize = mtu + ENET_HEADER_SIZE;	else		dprintf("ipro1000: unsupported mtu setting '%s' ignored\n", param);	unload_driver_settings(handle);}