message: Don't underestimate chunk size for empty descriptor heaps
diff: @@ -258,7 +258,8 @@ uint32_t D3D12ResourceManager::GetSize_InitialState(ResourceId id, ID3D12DeviceC
  // the initial contents are just the descriptors. Estimate the serialise size here
  const uint32_t descriptorSerSize = 40 + sizeof(D3D12_SAMPLER_DESC);
  - return initContents.numDescriptors * descriptorSerSize;
  + // add a little extra room for fixed overhead
  + return 64 + initContents.numDescriptors * descriptorSerSize;
  }
  else if(record->type == Resource_Resource)
  {
  