Merge pull request #651 from libtom/pr/fix-warning-unusedvar-tiger

fix unused variable warning in hashes/tiger

src/hashes/tiger.c

@@ -791,9 +791,10 @@ int tiger_done(hash_state * md, unsigned char *out)
   Self-test the hash
   @return CRYPT_OK if successful, CRYPT_NOP if self-tests have been disabled
 */
-int s_tiger_test(unsigned int idx)
+static int s_tiger_test(unsigned int idx)
 {
  #ifndef LTC_TEST
+    LTC_UNUSED_PARAM(idx);
     return CRYPT_NOP;
  #else
   static const struct {