message: fixed unittest code compile error.
diff: @@ -10,7 +10,7 @@ void dns_callback(char *domain, swDNSResolver_result *result, void *data)
  int i;
  for (i = 0; i < result->num; i++)
  {
  - printf("ip[%d]: %s\n", i, result->host[i].address);
  + printf("ip[%d]: %s\n", i, result->hosts[i].address);
  }
  printf("private data=%s\n", (char *) data);
  }
  