message: Don't crash if OMSetRTVs is called with no RTVs and single handle flag
diff: @@ -1255,11 +1255,14 @@ bool WrappedID3D12GraphicsCommandList2::Serialise_OMSetRenderTargets(
  if(ser.IsWriting())
  {
  if(RTsSingleHandleToDescriptorRange)
  + {
  + if(pRenderTargetDescriptors && NumRenderTargetDescriptors > 0)
  {
  const D3D12Descriptor *descs = GetWrapped(pRenderTargetDescriptors[0]);
  RTVs.insert(RTVs.begin(), descs, descs + NumRenderTargetDescriptors);
  }
  + }
  else
  {
  for(UINT i = 0; i < NumRenderTargetDescriptors; i++)
  