port1.0/portutil.tcl: As addition to https://trac.macports.org/changeset/54002, do not compare variants if the statefile is empty, like on a fresh install.
port1.0/portutil.tcl:
As addition to https://trac.macports.org/changeset/54002, do not compare variants if the statefile is empty, like
on a fresh install.

git-svn-id: 620571fa9b4bd0cbce9a0cf901e91ef896adbf27@54017 d073be05-634f-4543-b044-5fe20cf6d1d6

neverpanic/macports-base,macports/macports-base,neverpanic/macports-base,danchr/macports-base,macports/macports-base,danchr/macports-base