Re: [PATCH v7 0/6] MR4092: user32: Actually implement RealGetWindowClass{A/W}.

[Jinoh Kang (＠iamahuman)]

Jinoh Kang (@iamahuman) commented about dlls/win32u/window.c:
> return TRUE;
>  }
>
> +static BOOL set_real_window_class_id( HWND hwnd, DWORD param )
> +{
> +    WND *win = get_win_ptr( hwnd );
> +
> +    if (!win) return FALSE;
> +    if (win == WND_OTHER_PROCESS || win == WND_DESKTOP)
> +    {
> +        ERR("Tried to set real window class on a window belonging to another process.\n");
> +        return FALSE;
> +    }
> +
> +    if (!win->real_class_id)

Is this merely an optimization to opportunistically avoid server calls? If so, it should behave the same as if the `if()` guard did not exist.

```suggestion:-0+0
    if (win->real_class_id != param)
```

-- 
https://gitlab.winehq.org/wine/wine/-/merge_requests/4092#note_49480