message: fix Intel compilation issues
diff: @@ -98,7 +98,7 @@ std::shared_ptr<const Csr> convert_to_csr_and_sort(
  if (!skip_sorting) {
  copy->sort_by_column_index();
  }
  - return copy;
  + return {std::move(copy)};
  }
  @@ -132,7 +132,7 @@ std::shared_ptr<const Csr> extend_sparsity(
  }
  // finally compute id^(n-1) * mtx
  id_power->apply(mtx.get(), tmp.get());
  - return tmp;
  + return {std::move(tmp)};
  }
  