/* 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;
}