[PATCH v5 0/4] MR6004: comctl32: A NULL string fix.

[Aida Jonikienė (＠DodoGTA)]

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  v5: user32/edit: Add some WM_ASKCBFORMATNAME tests.
      comctl32/user32: Add tests for NULL strings with edit control GETTEXT message.
      user32: Correctly handle NULL string in GETTEXT/CBFORMAT AtoW wrapper.
      comctl32/user32: Fail on NULL string for edit control WM_GETTEXT message.

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