bug#48228: json-serialize should signal error when dll is not found [MS Windows]

[Eli Zaretskii]

> Cc: p.stephani2@gmail.com, 48228@debbugs.gnu.org
> From: Dmitry Gutov <dgutov@yandex.ru>
> Date: Tue, 4 May 2021 19:10:27 +0300
> 
> On 04.05.2021 19:08, Eli Zaretskii wrote:
> > An alternative to signaling an error would be to provide a
> > json-avail-p functon which applications could test.  That would be
> > similar to what we do with other libraries, like image libraries and
> > GnuTLS.
> 
> That's an option.
> 
> I'd rather we chose a less error-prone approach, though. No pun intended.

OTOH, we will next have people asking why some libraries use one
paradigm and others another...