message: small fix, due to a variable changing from ptr to reference
diff: @@ -294,8 +294,8 @@ void Table::insert_column_link(size_t col_ndx, DataType type, StringData name, T
  size_t Table::get_backlink_count(size_t row_ndx) const noexcept
  {
  - size_t backlink_columns_begin = m_spec->first_backlink_column_index();
  - size_t backlink_columns_end = backlink_columns_begin + m_spec->backlink_column_count();
  + size_t backlink_columns_begin = m_spec.first_backlink_column_index();
  + size_t backlink_columns_end = backlink_columns_begin + m_spec.backlink_column_count();
  size_t ref_count = 0;
  for (size_t i = backlink_columns_begin; i != backlink_columns_end; ++i) {
  