Fix to col when printing half-line feeds w/ -f option...

Message-Id on openbsd-tech: 20141017195810.GJ132@iris.usta.de
Submitted by:	Ingo Schwarze
Obtained from:	OpenBSD
MFC after:	3 days


git-svn-id: svn+ssh://svn.freebsd.org/base/head@273242 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f