scroll-speed-num-lines-per-scroll only works with whole numbers now

[kswope]

tmux 2.7 brew install

from the docs

"3" (default) - Scroll three lines per every mouse wheel click.
"1" - One line per mouse wheel scroll click (smoothest).
"0.5" - Scroll one line only on every other mouse wheel scroll click.
"0.25" - Scroll one line only on every fourth mouse wheel scroll click.

The "0.5" and "0.25" cause a "Repeat Count Invalid" error from tmux.

[ght]

I just tested this on Arch Linux with tmux 2.7 and aa59077 and scroll-speed-num-lines-per-scroll set to 0.5, 0.25, 0.1 and some others and they all work as expected for me.

After some digging and finding abd5ea1 (part of #33) I realized though that this issue still exists and is known, but only affects copy-mode, not emulate-scroll-for-no-mouse-alternate-buffer which I tested first, @kswope maybe add that to the issue title to make it easier to find for people having the same issue.