patch applied (cabal-install): Check that InstallPlan dependencies respect a state relation

[Duncan Coutts]

Tue May  6 17:02:09 PDT 2008  Duncan Coutts <duncan at haskell.org>
  * Check that InstallPlan dependencies respect a state relation
  For example it's not allowed for installed packages to depend
  on configured packages.

    M ./Hackage/InstallPlan.hs +38

View patch online:
http://darcs.haskell.org/cabal-install/_darcs/patches/20080507000209-adfee-98a91b7a7c69c63a5e2721af076f6d7c8dfbfa5c.gz