message: Initialise dynamically used count to 0 even without dynamic feedback
  * Since we increment this for every descriptor when we don't have feedback, we
  can't have it start at ~0U
diff: @@ -1322,12 +1322,9 @@ void D3D12Replay::FillRootElements(uint32_t eventId, const D3D12RenderState::Roo
  else
  element.type = BindType::ReadWriteResource;
  - if(usage.valid)
  - {
  element.firstUsedIndex = -1;
  element.lastUsedIndex = -1;
  element.dynamicallyUsedCount = 0;
  - }
  element.views.reserve(num);
  