Previous GCC versions do not support the C23 change that
allows labels on declarations.
Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
In single-request mode, there is no second response after an error
because the second query has not been sent yet. Waiting for it
introduces an unnecessary timeout.
Reviewed-by: DJ Delorie <dj@redhat.com>