IndieWeb Challenge Day 8

Eventually, perhaps, I'll learn to think things through properly, but for now it seem that trial and error just leads me to more errors and more trials. My improved logic for detecting whether a post was a Review or a Listen failed to detect that it was neither of those things. As a result, those pages were having an empty image thrust upon them whether they wanted one or not. Now fixed.

But now I really need to work out why pagination has stopped working entirely. Something about how Grav handles a collection based on a category, I'm sure, but what?