patch applied (cabal-branches/cabal-install-0.6): Only apply preferences to base if its version is unbounded above

[Duncan Coutts]

Thu Jun  4 18:04:36 PDT 2009  Duncan Coutts <duncan at haskell.org>
  * Only apply preferences to base if its version is unbounded above
  This is a backport to the cabal-install 0.6.x series. It relies
  on the VersionIntervals ADT which was added in Cabal-1.7.x, so
  that also had to be backported.

    M ./Distribution/Client/Dependency/TopDown.hs -5 +20

View patch online:
http://darcs.haskell.org/cabal-branches/cabal-install-0.6/_darcs/patches/20090605010436-adfee-ccd75690f764dd4b084943207e840930ebf10156.gz