Return a useful error code when fetching to an non-writable directory
Return a useful error code when fetching to an non-writable directory

git-svn-id: 620571fa9b4bd0cbce9a0cf901e91ef896adbf27@919 d073be05-634f-4543-b044-5fe20cf6d1d6

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