message: Fix small valgrind complaint
diff: @@ -330,6 +330,7 @@ void KellyErrorEstimator::ComputeEstimates()
  }
  total_error = error_estimates.Sum();
  + delete flux;
  return;
  }
  @@ -437,6 +438,7 @@ void KellyErrorEstimator::ComputeEstimates()
  // because the error is stored on the remote process and
  // recomputed there.
  }
  + delete flux;
  // Finalize element errors
  for (int e = 0; e < xfes->GetNE(); e++)
  