patch applied (cabal-install): Fix handling of unadorned package names

[Duncan Coutts]

Wed Oct 17 16:06:53 PDT 2007  Duncan Coutts <duncan at haskell.org>
  * Fix handling of unadorned package names
  ie make "cabal install xmonad" work ;-)
  We were parsing unqalified package names as a dependency upon a specific but
  empty version. That is treating "foo" as a dependency like "foo==".
  We now treat unadroned package names as deps on any version.

    M ./Hackage/Utils.hs -2 +5