message: RenderFrame work unit is already flushing, don't flush twice
diff: @@ -773,7 +773,6 @@ namespace ospray {
  OSPRenderer _renderer,
  const uint32 fbChannelFlags)
  {
  - bufferedComm->flush();
  // Note: render frame is flushing so the work error result will be set,
  // since the master participates in rendering
  work::RenderFrame work(_fb, _renderer, fbChannelFlags);
  