[PATCH 0/3] MR8500: Some improvements to widl.

[eric pouech (＠epo)]

This MR improves widl with  :
- fixes a segfault when inheriting from an incomplete interface
  (prints an error message instead),
- supports (for C++) inheriting from interfaces which are declared
  after the declaration of the derived interface.

-- 
https://gitlab.winehq.org/wine/wine/-/merge_requests/8500