macports1.0: Be more verbose which PortIndex file has a problem.
macports1.0:
Be more verbose which PortIndex file has a problem.

git-svn-id: 620571fa9b4bd0cbce9a0cf901e91ef896adbf27@57871 d073be05-634f-4543-b044-5fe20cf6d1d6

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