patch applied (cabal): Eliminate NoLowerBound, Versions do have a lower bound of 0.

[Duncan Coutts]

Wed Dec 10 06:54:33 PST 2008  Duncan Coutts <duncan at haskell.org>
  * Eliminate NoLowerBound, Versions do have a lower bound of 0.
  This eliminates the duplicate representation of ">= 0" vs "-any"
  and makes VersionIntervals properly canonical.

    M ./Distribution/Version.hs -14 +16

View patch online:
http://darcs.haskell.org/cabal/_darcs/patches/20081210145433-adfee-f391dbb44633e9a52a6f789032278bc010241434.gz