ports/147242: ports-mgmt/portupgrade incorrectly remove old port when new one fails to compile

[pgollucci at FreeBSD.org]

Synopsis: ports-mgmt/portupgrade incorrectly remove old port when new one fails to compile

Responsible-Changed-From-To: ruby->pgollucci
Responsible-Changed-By: pgollucci
Responsible-Changed-When: Thu Sep 9 23:12:20 UTC 2010
Responsible-Changed-Why: 
I will take it

http://www.freebsd.org/cgi/query-pr.cgi?pr=147242