message: Fix conversion error in bench from int -> size_t
diff: @@ -50,8 +50,8 @@ namespace ospray {
  std::vector<std::string> files;
  std::string imageOutputFile = "";
  - int numWarmupFrames = 10;
  - int numBenchFrames = 100;
  + size_t numWarmupFrames = 10;
  + size_t numBenchFrames = 100;
  int width = 1024;
  int height = 1024;
  