message: use old behaviour in tobj
diff: @@ -38,7 +38,7 @@ fn small_lap_mat() -> sprs::CsMat<f64> {
  }
  fn lap_mat_from_obj(path: &str) -> Result<sprs::CsMat<f64>, tobj::LoadError> {
  - let (objects, _materials) = tobj::load_obj(&Path::new(path), false)?;
  + let (objects, _materials) = tobj::load_obj(&Path::new(path), true)?;
  for obj in objects {
  let nb_triangles = obj.mesh.indices.len() / 3;
  let nb_vertices = obj.mesh.positions.len() / 3;
  