[sup-talk] [PATCH] don't try to open the next thread if there isn't one available

[William Morgan]

Reformatted excerpts from its.jeff.balogh's message of 2008-01-30:
> When you're on the last thread of a ThreadSet and press ',<key>',
> nothing happens, but you can't '.<key>' since @dying == true.  This
> patch changes :next to :kill if there is no next thread.

I made a parallel change to do this:
e47f9dabca0349a1fff046232961b38d900d4445. It's all withing
ThreadIndexMode#launch_next_thread_after, which I think is a little
cleaner.

As I mentioned in the previous email, I also just changed these
operations so that they don't automatically save state to disk, so as to
be consistent with the rest of Sup.

-- 
William <wmorgan-sup at masanjin.net>