static int vvalue_tvb_lpwstr(tvbuff_t *tvb, int offset, void *val)
{
	struct data_str *str = (struct data_str*)val;

	str->len = tvb_get_letohl(tvb, offset);

	return 4 + vvalue_tvb_lpwstr_len(tvb, offset + 4, 0, val);
}
static int vvalue_tvb_lpwstr(tvbuff_t *tvb, int offset, void *val)
{
	struct data_str *str = (struct data_str*)val;

	str->len = tvb_get_letohl(tvb, offset);

	return 4 + vvalue_tvb_lpwstr_len(tvb, offset + 4, 0, val);
}