vocabulary 'module' field should be reset to 'taxonomy' on full redirect deletion?

Ok, I look after a module called 'taxonomy treemenu' and, on an issue queue request, I enabled the hook and now redirects work very nicely with this module.

I did discover a problem though. When a user removes redirects from a vocabulary, fully, the module field stays as 'taxonomy_redirect'. Course, any links built from the information would revert to stock taxonomy items, but this causes my my module to stumble, and other modules are continually invoked, even if there's nothing going on.

Sorry, but I don't have the time to check if the field ought to be reverted, conceptually, or supply patches should that be the case. Think it's worth mentioning, though.