message: Fixing ZeroWrap to work on device.
diff: @@ -360,9 +360,10 @@ public:
  void Mult(const Vector& x, Vector& y) const
  {
  amg_.Mult(x, y);
  + auto Y = y.HostWrite();
  for (int k : ess_tdof_list_)
  {
  - y(k) = 0.0;
  + Y[k] = 0.0;
  }
  }
  