setup.exe gets confused when there's a test: but no curr: or prev: of a package

[Andrew Schulman]

I released version 4.0.3-1 of screen yesterday as test: .  There are no
prev: or curr: versions of it.

In setup.exe 2.573.2.2, screen is shown in the "Curr" distribution, with an
empty description.  A little poking around shows that the same thing
happens to all packages that have only test releases, with no current or
previous-- e.g. emacs-leim, libecpg* .

Andrew.