magit/magit — pull request #937 by schouleu (2013-09-25 23:47:57+00:00)
Title: magit-blame: fix previous way

As this function is called by magit-blame-previous-chunk, it needs to
be able to inverse the search direction.
We use the order of beg/end args to do this:
- if beg > end, then return the previous chunk
- if beg < end, then return the next chunk

Signed-off-by: Sylvain Chouleur