bug#36225: 26.2.90; Can't build master

[Eli Zaretskii]

> From: Philipp Stephani <p.stephani2@gmail.com>
> Date: Sat, 15 Jun 2019 18:34:32 +0200
> Cc: 36225@debbugs.gnu.org
> 
> > The comment to CHECK_STRUCTS in src/config.h tells you what to do in
> > this case.
> 
> Yes, it says "If you change one of these structures, check that the
> pdumper.c code is still valid", but since I didn't change the
> structure, I can't decide whether the pdumper code is still valid.
> Whoever changed the definition of Lisp_Buffer_Objfwd should make that
> call.

It says to update the pertinent hash in pdumper.c by manually copying
the hash from dmpstruct.h.  The hash to be updated is called out by
the error message.  So I think the information you need is there to
fix your build.