Fixes #49

[RosaWagner]

it is supposed to fix it.

[RosaWagner]

@dy If you can re-build all the fonts with that fix and make a release, I can ship them before the holidays. You can also fill up this form so we can register your biography: https://docs.google.com/forms/d/e/1FAIpQLSeMwHN8J213ZaxHrr5lHCrX56HY_NjGrWB8o604g98YxuMrdA/viewform

[dy]

Got it. Will do a bit later, have no access to personal laptop. Thank you for guidance!

[dy]

Ok, published wavefont@3.1.0