message: Dummy textures should have size 1x1
diff: @@ -512,7 +512,7 @@ void load_obj(std::string const& filename, model& mod)
  for (size_t i = mod.textures.size(); i <= geom_id; ++i)
  {
  using tex_type = model::texture_type;
  - tex_type::ref_type tex(0, 0);
  + tex_type::ref_type tex(1, 1);
  mod.textures.push_back(tex);
  }
  