fix support for printers that use packbits transfer mode, like PT-D450PV

build-aux/git-version-gen

@@ -0,0 +1,3 @@
+#!/bin/sh
+GIT_VERSION=$(git --no-pager describe --tags --dirty |sed 's/\([^-]*-g\)/r\1/;s/-/./g;s/v//g')
+echo -ne ${GIT_VERSION}