patch applied (cabal-install): Rearange install plan checking code

Thu Apr 24 15:41:59 PDT 2008 Duncan Coutts * Rearange install plan checking code Make it usable for callers that want to check properties before constructing an InstallPlan. M ./Hackage/InstallPlan.hs -51 +52 View patch online: http://darcs.haskell.org/cabal-install/_darcs/patches/20080424224159-adfee-2...