bug#43597: 28.0.50; arc-mode.el fails to display a ZIP file

[Stephen Berman]

On Fri, 25 Sep 2020 16:33:21 +0300 Eli Zaretskii <eliz@gnu.org> wrote:

>> Date: Fri, 25 Sep 2020 15:43:48 +0300
>> From: Eli Zaretskii <eliz@gnu.org>
>> Cc: 43597@debbugs.gnu.org
>>
>> > Date: Fri, 25 Sep 2020 15:38:56 +0300
>> > From: Eli Zaretskii <eliz@gnu.org>
>> > Cc: 43597@debbugs.gnu.org
>> >
>> > Thanks, with this file I do see the problem.
>>
>> Oops, I spoke too soon, using the wrong version of Emacs to test this.
>>
>> The change -1 => #xffffffff fixes the problem with this file as well.
>> So I guess the remaining issues rear their ugly heads in a 64-bit
>> Emacs, and I need to debug there...
>
> Wrong again, sigh...  This has nothing to do with 64-bit builds.
>
> Anyway, here's the proposed patch, please test:

It works for me (at first I applied it to master and the patch partly
failed to apply, then I looked at the line numbers and realized it was
for Emacs 27).  Thanks.

Steve Berman