build: record the gettext-0.18 requirement also in configure.ac

* configure.ac: Require gettext-0.18 here, too.

diff --git a/configure.ac b/configure.ac
index b07a52b..e7037a1 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -432,7 +432,7 @@ AC_SUBST([CONFIG_STATUS_DEPENDENCIES])
 # As long as "grep 'PRI[diouxX]' po/*.pot" reports matches in
 # translatable strings, we must use need-formatstring-macros here.
 AM_GNU_GETTEXT([external], [need-formatstring-macros])
-AM_GNU_GETTEXT_VERSION([0.17])
+AM_GNU_GETTEXT_VERSION([0.18])
 
 # For a test of uniq: it uses the $LOCALE_FR envvar.
 gt_LOCALE_FR