[PATCH 0/1] MR11145: dsound: Get rid of non-float mixing remnants.

[Matteo Bruni (＠Mystral)]

Since bfa7387c03992f172b7e080f1705b7c72ae32156, dsound is guaranteed
to use a float format for its mixing output, although in practice it
was often the case even before then. Simplify code accordingly.

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https://gitlab.winehq.org/wine/wine/-/merge_requests/11145