[PATCH v3 0/3] MR6004: comctl32: A NULL string fix.

[Aida Jonikienė (＠DodoGTA)]

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  v3: comctl32/tests: Add tests for NULL strings with edit control WM_GETTEXT message.
      user32: Correctly handle NULL string in WM_GETTEXT AtoW wrapper.

https://gitlab.winehq.org/wine/wine/-/merge_requests/6004