message: fixing AmgXSolver zero_guess style
diff: @@ -888,7 +888,7 @@ void AmgXSolver::Mult(const Vector& B, Vector& X) const
  {
  // Set initial guess to zero
  X.UseDevice(true);
  - if (zero_guess) X = 0.0;
  + if (zero_guess) { X = 0.0; }
  // Mult for serial, and mpi-exclusive modes
  if (mpi_gpu_mode != "mpi-teams")
  