RFA: probable rs6000-aix-tdep.c bug found by clang

[Joel Brobecker]

> I now notice the PR predates the patch that added this (a8cfed2a), and
> it seems the patch was meant to fix exactly that single-step issue in
> the PR.  So I guess we could close it.

That was the first thing I started looking for when I eventually
checked the PR :-). I closed the ticket.

> Searching bugzilla for aix finds a handful of PRs, and most looks
> quite old.  I'd be nice to give them a little triage love.  :-)

I can add that to my list...

-- 
Joel