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

[Eli Zaretskii]

> From: Nikolay Kudryavtsev <nikolay.kudryavtsev@gmail.com>
> Cc: rpluim@gmail.com, p.stephani2@gmail.com, 48228@debbugs.gnu.org
> Date: Thu, 6 May 2021 18:26:49 +0300
> 
> But first we'd have to get X-available-p(or some other convention) working 
> for everything.

We have it already for almost every X.

> Would it be
> acceptable for Emacs to ship with a small image in every supported format? 
> Then imageX-available-p can
> be implemented by opening that image and catching the failure in create-image.

That shouldn't be necessary, since we already have image-type-available-p.