message: CGSolver norm<0 fix.
diff: @@ -735,7 +735,8 @@ void CGSolver::Mult(const Vector &b, Vector &x) const
  {
  d = r;
  }
  - nom0 = nom = initial_norm = Dot(d, r);
  + nom0 = nom = Dot(d, r);
  + if (nom0 >= 0.0) { initial_norm = sqrt(nom0); }
  MFEM_ASSERT(IsFinite(nom), "nom = " << nom);
  if (print_options.iterations || print_options.first_and_last)
  {
  @@ -753,6 +754,7 @@ void CGSolver::Mult(const Vector &b, Vector &x) const
  }
  converged = false;
  final_iter = 0;
  + initial_norm = nom;
  final_norm = nom;
  return;
  }
  