message: Issue fixed compilation error on CentOS 6.8
diff: @@ -1097,7 +1097,7 @@ run_single_test(Configuration *conf)
  if (ok) {
  printf("\n[OK] %s\n", conf->filename.c_str());
  - if (!conf->quiet || conf->metrics != Configuration::kMetricsNone) {
  + if (!conf->quiet || conf->metrics) {
  printf("\ttotal elapsed time (sec) %f\n",
  metrics.elapsed_wallclock_seconds);
  print_metrics(&metrics, conf);
  