bug 4328: still have issues getting filename from parsed part.  this commit makes it very explicit where the info should come from.
bug 4328: still have issues getting filename from parsed part.  this commit makes it very explicit where the info should come from.

git-svn-id: e9fe9b84e32fc5e57b7d09c40cd78b14ea28ed71@179299 13f79535-47bb-0310-9956-ffa450edef68

apache/spamassassin,apache/spamassassin,apache/spamassassin,apache/spamassassin,apache/spamassassin