Hi,

On NetBSD, building gzip from git (with the newest gnulib) and
running "make check" as root produces 1 test failure:


FAIL: write-error
=================

FAIL write-error (exit status: 1)


How to reproduce:
1. Download tarball.zip from
   https://github.com/gnu-gzip/ci-check/actions/runs/9033181872/artifacts/1491311737
2. Unpack it.
3. tar xfz gzip-2024-05-10.tar.gz
4. ./configure; make; make check


The attached patch fixes it (and produces no regressions).