[m-rev.] for review: adjust bounds checking behaviour of array.fetch_items/4

[Zoltan Somogyi]

On Fri, 16 Aug 2019 12:03:31 +1000 (AEST), Julien Fischer <jfischer at opturion.com> wrote:
> For review by Zoltan.

The diff is fine. I would make the comments a bit more extensive,
but I can do that more easily as a separate change after this is committed.

Zoltan.