lib-fts: Avoid compiler warning when building without libicu

diff --git a/src/lib-fts/fts-filter-lowercase.c b/src/lib-fts/fts-filter-lowercase.c
index f5de6f91e75c5eb15c617c43110061ad2581ad74..0fce9f25cde586af1247ca6bfc6db8a28521e367 100644 (file)
--- a/src/lib-fts/fts-filter-lowercase.c
+++ b/src/lib-fts/fts-filter-lowercase.c
@@ -37,7 +37,7 @@ fts_filter_lowercase_create(const struct fts_language *lang ATTR_UNUSED,
 }
 
 static int
-fts_filter_lowercase_filter(struct fts_filter *filter,
+fts_filter_lowercase_filter(struct fts_filter *filter ATTR_UNUSED,
                            const char **token,
                            const char **error_r ATTR_UNUSED)
 {