patch applied (cabal): If we export ParseResult, we should export PError and PWarning, too

[Sven Panne]

Thu Mar 22 09:43:40 PDT 2007  sven.panne at aedion.de
  * If we export ParseResult, we should export PError and PWarning, too

    M ./Distribution/InstalledPackageInfo.hs -3 +3