bug#46111: Reverting fns.c hash function due to OpenBSD/SPARC64 compile breaking

[Eli Zaretskii]

> From: Stefan Monnier <monnier@iro.umontreal.ca>
> Cc: eliz@gnu.org,  46111@debbugs.gnu.org
> Date: Thu, 28 Jan 2021 10:09:21 -0500
> 
> Hmm... so it's doing a dereference at address 0x47fa34d596 and getting
> a bus error?

Yes.

> I have two questions here:
> 
> - I'd guess that the bus error is due to alignment restrictions.
>   What hardware is this running on?

See the Subject: it's SPARC64.

> - AFAICT from the backtrace, `ptr` points to a plain normal ELisp
>   string's content, yet these are supposed to be aligned, so what's
>   going on here

I wondered that myself.