message: Travis should pass now?!
diff: @@ -126,7 +126,7 @@ double RelaxedNewtonSolver::ComputeScalingFactor(const Vector &x,
  x_gf.SetFromTrueVector();
  energy_out = nlf->GetParGridFunctionEnergy(x_gf);
  - if (energy_out > 1.2*energy_in || isnan(energy_out) != 0)
  + if (energy_out > 1.2*energy_in || std::isnan(energy_out) != 0)
  {
  if (print_level >= 0)
  { cout << "Scale = " << scale << " Increasing energy." << endl; }
  @@ -241,7 +241,7 @@ double DescentNewtonSolver::ComputeScalingFactor(const Vector &x,
  add(x, -scale, c, x_out);
  energy_out = nlf->GetEnergy(x_out);
  - if (energy_out > energy_in || isnan(energy_out) != 0)
  + if (energy_out > energy_in || std::isnan(energy_out) != 0)
  {
  scale *= 0.5;
  }
  