patch applied (cabal): Fix the register --gen-pkg-config flag

[Duncan Coutts]

Thu Jun 12 02:24:25 PDT 2008  Duncan Coutts <duncan at haskell.org>
  * Fix the register --gen-pkg-config flag
  When specified without any file name it is supposed to use
  a default file name rather than be ignored completely.

    M ./Distribution/Simple/Register.hs -3 +4
    M ./Distribution/Simple/Setup.hs -1 +1

View patch online:
http://darcs.haskell.org/cabal/_darcs/patches/20080612092425-adfee-cff3112fbd809d4d293b730555c69c46162361d8.gz