/* USB::DevHandle#usb_set_altinterface(alternate) */
static VALUE
rusb_set_altinterface(VALUE v, VALUE alternate)
{
usb_dev_handle *p = get_usb_devhandle(v);
int ret = usb_set_altinterface(p, NUM2INT(alternate));
check_usb_error("usb_set_altinterface", ret);
return Qnil;
}