Error drawable not shown on null model.

[sjudd]

From @mare011 in #1971:

Also in the code bellow, error drawable is not used when the url is null, and docs state: "null models will cause the error drawable to be displayed", this is working in the latest 3.x version.

Glide load line / GlideModule (if any) / list Adapter code (if any):

GlideApp.with(this).load(contractImage) // contractImage is null
.transform(new CropCircleTransformation())
.error(errorDrawable)
.into(imageView);