Re: Fix branch ancestry calculation

Linus Torvalds wrote:

Some branches don't get any ancestors at all, because their ancestor gets 
a "dotcount" value of 0, and are thus not considered any better than not 
having any ancestor. That's obviously wrong. Even a zero-dot-count 
ancestor is better than having none at all.

This fixes the issue by making not having an ancestor branch have a 
goodness value of -1, avoiding the problem (because even a zero dot-count 
will be considered better).

Alternatively, the special-case for the "1.1.1.1" revision should be 
removed (or made to imply a dot-count of 1).

Thanks for this.  I'll look at bundling this and some miscellaneous 
other stuff this weekend (pray to gods for rain so I can stay in all 
weekend ;-).

Anyway, I'd like to nail down some of the other nagging ancestry/branch 
point problems if possible.

David