message: Don't try to present on D3D12On7 for headless outputs
diff: @@ -639,7 +639,7 @@ void D3D12Replay::FlipOutputWindow(uint64_t id)
  if(bbbarrier.Transition.pResource)
  list->ResourceBarrier(1, &bbbarrier);
  - if(m_D3D12On7)
  + if(m_D3D12On7 && outw.wnd)
  {
  ID3D12Resource *res = outw.colResolve ? outw.colResolve : outw.col;
  