patch applied (cabal): Don't nub extra-libs in unionBuildInfo

[Duncan Coutts]

Sun Apr 20 12:23:12 PDT 2008  Duncan Coutts <duncan at haskell.org>
  * Don't nub extra-libs in unionBuildInfo
  It's possible that we sometimes need to list the same library
  more than once if there are circular symbol references.

    M ./Distribution/PackageDescription.hs -1 +1

View patch online:
http://darcs.haskell.org/cabal/_darcs/patches/20080420192312-adfee-077ab5a13c7d248c480ce1d7f63523fdc506e407.gz