ref: 3b42640e3fb914aa48ae8036d2cb774cb45892de
parent: 65f803e1fa42fc1ca0b9ddac09f61a538b802841
author: Bjørn Erik Pedersen <bjorn.erik.pedersen@gmail.com>
date: Sun Nov 20 09:59:21 EST 2016
hugolib: Don't write zero-bytes files to disk Fixes #2709