join: avoid test failure on systems with no French UTF-8 locale

* tests/misc/join-utf8.sh: Test the value of LOCALE_FR_UTF8 against
'none', not against a missing value.
Fixes https://bugs.gnu.org/69418

diff --git a/tests/misc/join-utf8.sh b/tests/misc/join-utf8.sh
index 2dbe2bb8150713294da5868f24afdb3fbc91e510..9af9e55ce23f60144b82dd52ee2136e92ced1fbc 100755 (executable)
--- a/tests/misc/join-utf8.sh
+++ b/tests/misc/join-utf8.sh
@@ -19,7 +19,7 @@
 . "${srcdir=.}/tests/init.sh"; path_prepend_ ./src
 print_ver_ join
 
-test "${LOCALE_FR_UTF8+set}" = set || skip_ "French UTF-8 locale not available"
+test "$LOCALE_FR_UTF8" != none || skip_ "French UTF-8 locale not available"
 
 LC_ALL=$LOCALE_FR_UTF8
 export LC_ALL