Re: [PATCH 0/4] MR7219: win32u, winex11.drv: Fix multiple Vulkan surfaces handling.

[Rémi Bernon]

Rémi Bernon (@rbernon) commented about dlls/winex11.drv/vulkan.c:
> HRGN region;
>      HDC hdc;
>
> +    if (!hwnd) return;

This should probably be moved to win32u instead, and avoid calling into drivers with detached surfaces / NULL hwnd?

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https://gitlab.winehq.org/wine/wine/-/merge_requests/7219#note_93095