message: fixes custom dense view test
diff: @@ -452,7 +452,7 @@ private:
  std::unique_ptr<gko::matrix::Dense<>> create_view_of_impl() override
  {
  auto view = create(this->get_executor(), {}, this->get_data());
  - gko::matrix::Dense<>::create_view_of_impl()->move_to(this);
  + gko::matrix::Dense<>::create_view_of_impl()->move_to(view.get());
  return view;
  }
  