message: Comment out unnecessary call to HostReadWrite.
diff: @@ -1894,7 +1894,7 @@ void GridFunction::ProjectBdrCoefficient(VectorCoefficient &vcoeff,
  void GridFunction::ProjectBdrCoefficient(Coefficient *coeff[], Array<int> &attr)
  {
  Array<int> values_counter;
  - this->HostReadWrite();
  + // this->HostReadWrite(); // done inside the next call
  AccumulateAndCountBdrValues(coeff, NULL, attr, values_counter);
  ComputeMeans(ARITHMETIC, values_counter);
  #ifdef MFEM_DEBUG
  