`D3D12_RT_FORMAT_ARRAY` type is missing the `typedef`

[phoekz]

In d3d12.h, every other type seems to have a typedef struct X { ... } X; pattern, except for D3D12_RT_FORMAT_ARRAY 😅:

struct D3D12_RT_FORMAT_ARRAY
    {
    DXGI_FORMAT RTFormats[ 8 ];
    UINT NumRenderTargets;
    } ;