caseproto_ref: Append compiler directive WARN_UNUSED_RESULT

diff --git a/src/data/caseproto.h b/src/data/caseproto.h
index 0bc02812d18590aeb3ba4ca664445f8134d488bf..a8468ddeed3b5c5b1978e83897eb956d7ccd5bef 100644 (file)
--- a/src/data/caseproto.h
+++ b/src/data/caseproto.h
@@ -80,8 +80,8 @@ struct pool;
 
 /* Creation and destruction. */
 struct caseproto *caseproto_create (void) MALLOC_LIKE;
-static inline struct caseproto *caseproto_ref (const struct caseproto *);
-struct caseproto *caseproto_ref_pool (const struct caseproto *, struct pool *);
+static inline struct caseproto *caseproto_ref (const struct caseproto *) WARN_UNUSED_RESULT;
+struct caseproto *caseproto_ref_pool (const struct caseproto *, struct pool *) WARN_UNUSED_RESULT;
 static inline void caseproto_unref (struct caseproto *);
 
 /* Inspecting stored widths.  */