bug#7480: 24.0.50 no images in Custom

[Chong Yidong]

Jonas Bernoulli <jonas@bernoul.li> writes:

> In Custom buffers no images are shown for widgets that support it;
> instead the respective text representations are shown.
> `widget-image-enable' is t and the required images can be found.
>
> I verified that `widget-image-insert' actually does get called when
> appropriate and likewise calls `image-insert' .

Could you provide a simple step-by-step recipe for reproducing this bug,
starting from `emacs -Q'?  Your description is not precise enough to
figure out where exactly the problem lies.