lib: fix segfault with --without-intl

Node.js segfaults when build with `--without-intl` due to an oversight
in d13cdd9c. This fixes the issue.

PR-URL: https://github.com/nodejs/node/pull/21589


Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Gus Caplan <me@gus.host>
Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com>
Reviewed-By: Refael Ackermann <refack@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>