Fix recursive uninstall for case where multiple branches of dep tree contain the same port
Fix recursive uninstall for case where multiple branches of dep tree contain the same port

git-svn-id: 620571fa9b4bd0cbce9a0cf901e91ef896adbf27@35042 d073be05-634f-4543-b044-5fe20cf6d1d6

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