Re: [PATCH v11 0/8] MR662: vkd3d-shader/ir: Introduce a better CFG structurizer, part 2.

[Giovanni Mascellani (＠giomasce)]

I realized that `loops_by_header` kept references to an array that gets reallocated; so I replaced those pointers with indices in the `loops` array.

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https://gitlab.winehq.org/wine/vkd3d/-/merge_requests/662#note_62933