QA progress-bar, zero files

[alexxroche]

test with zero files

[bahamas10]

hello! thank you for the code change I appreciate it - and I agree that running this when the total len is 0 is very confusing so this change fixes that.

I have one style nit before I merge this - if you're curious about the style i prefer I've outlined it all here: https://style.ysap.sh

[bahamas10]

style nit: use (( ... )) for arithmetic expressions - please change this to:

if ((len == 0)); then
  return
fi

Or if you'd still like it all on one line I'm ok with:

((len == 0)) && return

[bahamas10]

closing this due to inactivity - feel free to re-open if you'd like to get this change merged with the style changes made.