message: Fix untyped conversion in PNG operator test
diff: @@ -19,7 +19,7 @@ std::string engineName; // comes from command line
  template <class T>
  static T Random100()
  {
  - return std::rand() % 100;
  + return static_cast<T>(std::rand() % 100);
  }
  void PNGAccuracy2D(const std::string compressionLevel)
  