tog's blame view segfaults when invoked on a zero-length file.
That shouldn't happen.

I'm less clear on what should happen.  I guess the current code
tries to do nothing, but that might be confusing.  An "empty" blame
view [0/0]?  The code is really not set up for this now.

-- 
Christian "naddy" Weisgerber                          naddy@mips.inka.de