patch applied (ghc-6.6/packages/Cabal): Check exit codes!

[Duncan Coutts]

Fri Sep  8 10:36:15 PDT 2006  Duncan Coutts <duncan.coutts at worc.ox.ac.uk>
  * Check exit codes!
  Cabal was not noticing haddock failing. That's bad.

    M ./Distribution/Program.hs -8 +8
    M ./Distribution/Simple.hs +1