vendor/libsodium/src/libsodium/include/sodium/crypto_auth_hmacsha256.h in rbnacl-libsodium-1.0.5 vs vendor/libsodium/src/libsodium/include/sodium/crypto_auth_hmacsha256.h in rbnacl-libsodium-1.0.6

@@ -28,10 +28,11 @@
 
 SODIUM_EXPORT
 int crypto_auth_hmacsha256_verify(const unsigned char *h,
                                   const unsigned char *in,
                                   unsigned long long inlen,
-                                  const unsigned char *k);
+                                  const unsigned char *k)
+            __attribute__ ((warn_unused_result));
 
 /* ------------------------------------------------------------------------- */
 
 typedef struct crypto_auth_hmacsha256_state {
     crypto_hash_sha256_state ictx;