version-etc: fix regression * lib/version-etc.h (ATTRIBUTE_SENTINEL): Define for new enough gcc. (version_etc): Use it, to catch bugs with trailing NULL. * lib/version-etc.c (version_etc_arn): Delete unused argument. (version_etc_va): Fix logic bug. * modules/version-etc-tests: Add test. * tests/test-version-etc.c: New file. * tests/test-version-etc.sh: Likewise. Signed-off-by: Eric Blake <ebb9@byu.net>

#!/bin/sh

# Test in an ISO-8859-1 or ISO-8859-15 locale.
: ${LOCALE_FR=fr_FR}
if test $LOCALE_FR = none; then
  if test -f /usr/bin/localedef; then
    echo "Skipping test: no traditional french locale is installed"
  else
    echo "Skipping test: no traditional french locale is supported"
  fi
  exit 77
fi

LC_ALL=$LOCALE_FR \
./test-mbmemcasecoll${EXEEXT} 1