Re: [PATCH 3/4] progress: Fix progress meters when dealing with lots of work

Elijah Newren [off-list ref] writes:

  2) Instead of counting pairs of source/dest files compared, just
count number of dest paths completed.  (Thus, we wouldn't need a value
big enough to hold rename_dst_nr * rename_src_nr, just big enough to
hold rename_dst_nr).

This sounds like the most sensible thing to do even if we do switch
to larger integer size, but that is orthogonal to the main point of
this series.