[dwm] cycling tags, again...

Hi,

one last attempt before giving up the "show previous/next tag" idea
forever ;-)

What about functions for viewing the previous/next tags for all tags
currently selected? Example: dwm is configured to have five tags.
You're viewing tags 2 and 4. After calling viewnext() you'd be viewing
tags 3 and 5; calling viewprev() would have resulted in tags 1 and 3
being viewed. The attached patch does what I'm trying to explain.

While I'm not sure I'd use this a lot when viewing multiple tags, it
gives the desired functionality when viewing only a single tag. And
at least it doesn't break anything in the former case...

Cheers, Jukka

-- 
bashian roulette:
$ ((RANDOM%6)) || rm -rf ~