message: Fix handling of UAVStartSlot above max RTV count
diff: @@ -3396,7 +3396,8 @@ bool WrappedID3D11DeviceContext::Serialise_OMSetRenderTargetsAndUnorderedAccessV
  // if we're not modifying RTVs, any that are < UAVStartSlot get unbound so don't consider
  // for validity
  valid = m_CurrentPipelineState->ValidOutputMerger(
  - m_CurrentPipelineState->OM.RenderTargets, UAVStartSlot,
  + m_CurrentPipelineState->OM.RenderTargets,
  + RDCMIN((UINT)D3D11_SIMULTANEOUS_RENDER_TARGET_COUNT, UAVStartSlot),
  m_CurrentPipelineState->OM.DepthView, ppUnorderedAccessViews, NumUAVs);
  }
  @@ -3544,7 +3545,8 @@ void WrappedID3D11DeviceContext::OMSetRenderTargetsAndUnorderedAccessViews(
  m_CurrentPipelineState->ValidOutputMerger(RTs, NumRTVs, pDepthStencilView, UAVs, NumUAVs);
  else
  valid = m_CurrentPipelineState->ValidOutputMerger(
  - m_CurrentPipelineState->OM.RenderTargets, D3D11_SIMULTANEOUS_RENDER_TARGET_COUNT,
  + m_CurrentPipelineState->OM.RenderTargets,
  + RDCMIN((UINT)D3D11_SIMULTANEOUS_RENDER_TARGET_COUNT, UAVStartSlot),
  m_CurrentPipelineState->OM.DepthView, UAVs, NumUAVs);
  if(valid)
  