[PATCH 0/1] MR6256: win32u: Don't request a host window surface for child windows.

[Rémi Bernon]

Fixes: b9879d5adc1cd98a6ceb7d087c4533fdd487bedb

Supersedes https://gitlab.winehq.org/wine/wine/-/merge_requests/6248

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https://gitlab.winehq.org/wine/wine/-/merge_requests/6256