message: Swap checks to put cheaper and more likely to fail test first
diff: @@ -114,8 +114,8 @@ void GraphWalker::walkGraph()
  */
  void GraphWalker::check(const MapCoordinate& position, Direction direction)
  {
  - if (!NAS2D::Rectangle<int>::Create({0, 0}, mTileMap.size()).contains(position.xy)) { return; }
  if (position.z < 0 || position.z > mTileMap.maxDepth()) { return; }
  + if (!NAS2D::Rectangle<int>::Create({0, 0}, mTileMap.size()).contains(position.xy)) { return; }
  auto& tile = mTileMap.getTile(position);
  