message: Use proper constant instead of magic number
diff: @@ -371,7 +371,7 @@ private:
  std::fstream file_;
  // Filled with log events by other threads.
  - detail::ringbuffer<event, 128> queue_;
  + detail::ringbuffer<event, queue_size> queue_;
  // Executes `logger::run`.
  std::thread thread_;
  