[AD] user data

["Vincent Penquerc'h" <Vincent.Penquerch@xxxxxxxxxx>]

Title: user data

Yes, I am at it again.
I think a marvellous idea would be to include a user data
(most probably a void*) in every structure of note, to allow
the user to store whatever she wants in those. Structures
that I particularly target are BITMAP and DIALOG (*yes*, DIALOG).
Such a field would NEVER be touched by Allegro. Before telling
me that it's useless, remember that Allegro is in C, not C++.
Any agreements ? :)
Cheers

--
Vincent Penquerc'h