[PATCH 0/1] MR6890: win32u: Use boolean instead of bool as name of a union member.

[Gerald Pfeifer (＠gerald)]

bool is a reserved identifier in C23 and would break with GCC 15
moving to -std=gnu23 (based on C23). Use boolean instead.

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https://gitlab.winehq.org/wine/wine/-/merge_requests/6890