bug#59334: 29.0.50; loading native-compiled init file sets user-init-file to .eln

[Eli Zaretskii]

> From: Juanma Barranquero <lekktu@gmail.com>
> Date: Fri, 18 Nov 2022 08:45:03 +0100
> Cc: akrl@sdf.org, 59334@debbugs.gnu.org
> 
> > I think the call to gethash should only be done if the file has the
> > .eln extension, otherwise you might have false positives.
> 
> Do you mean the hash comp-eln-to-el-h could have keys that match something 
> that doesn't end in .eln? Or
> that someone could've an init file with extension .eln and matching one of 
> the keys? Both seem extremely
> unlikely, but ok.

I thought about a possibility that the session loaded a .eln file, but
then the user or some Lisp explicitly loaded the .el file by hand.
I'm not sure in this case the hash table is updated.  Andrea, am I
right?