Re: git-diff-tree rename detection bug

Linus Torvalds [off-list ref] writes:

Undoing that second one (068eac91ce04b9aca163acb1927c3878c45d1a07) fixes 
the valgrind errors.

Thanks; reverted and applied your other patch and pushed them
out.

I think the filepairs are sometimes shared so to be able to free
them properly, we need to reference count.  Ugh.