message: Remove unneeded cast
  All values should be unsigned.
diff: @@ -715,7 +715,7 @@ void PathCache::Reset()
  void PathCache::Add(const std::vector< void* >& path, const std::vector< float >& cost)
  {
  - if (nItems + (int)path.size() > allocated * 3 / 4)
  + if (nItems + path.size() > allocated * 3 / 4)
  {
  return;
  }
  