receipt_flat: print a more informative error message when a receipt is malformed (see https://trac.macports.org/ticket/12596)
receipt_flat: print a more informative error message when a receipt is malformed (see https://trac.macports.org/ticket/12596)

git-svn-id: 620571fa9b4bd0cbce9a0cf901e91ef896adbf27@44612 d073be05-634f-4543-b044-5fe20cf6d1d6

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