patch applied (cabal-install): Use thisPackageVersion and notThisPackageVersion from Distribution.Package

[Duncan Coutts]

Thu May 29 13:47:14 PDT 2008  Duncan Coutts <duncan at haskell.org>
  * Use thisPackageVersion and notThisPackageVersion from Distribution.Package
  rather than the local definitions

    M ./Hackage/Dependency/TopDown.hs -10 +2

View patch online:
http://darcs.haskell.org/cabal-install/_darcs/patches/20080529204714-adfee-1331a5cc4b4c2c8c7091d20bfb1f12d4899e5f66.gz