Possible setup bug: downloading wrong src packages

[Robb, Sam]

It looks like setup.exe is downloading the wrong source
packages if a package has a "test" entry in setup.ini.

You can confirm this by doing a default installation,
setting the installation type to "Download from Internet",
and asking setup to download the source package for
zlib-1.1.4-1 (for example).

When the download is finished, you will find mismatched
packages in the release/zlib directory:

  zlib-1.1.4-1.tar.bz2
  zlib-1.1.4-2-src.tar.bz2

I can provide a setup.log ans setup.log.full if anyone
cares to take a look at them, though a quick examination
doesn't seem to show anything obviously wrong.

-Samrobb