message: Use Vector operations to center processing turn image
diff: @@ -285,7 +285,7 @@ std::vector<void*> path;
  void MapViewState::nextTurn()
  {
  NAS2D::Renderer& r = NAS2D::Utility<NAS2D::Renderer>::get();
  - r.drawImage(*IMG_PROCESSING_TURN, r.center_x() - (IMG_PROCESSING_TURN->width() / 2), r.center_y() - (IMG_PROCESSING_TURN->height() / 2));
  + r.drawImage(*IMG_PROCESSING_TURN, r.center() - IMG_PROCESSING_TURN->size() / 2);
  r.update();
  clearMode();
  