 - Really fix handling of empty argument to list command this time  - Cleanup pattern hiding to of argument to list command
 - Really fix handling of empty argument to list command this time
 - Cleanup pattern hiding to of argument to list command

git-svn-id: 620571fa9b4bd0cbce9a0cf901e91ef896adbf27@14114 d073be05-634f-4543-b044-5fe20cf6d1d6

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