patch applied (cabal): Improve the warning message about unsupported extensions.

Mon Mar 24 12:14:21 PDT 2008 Duncan Coutts * Improve the warning message about unsupported extensions. That is, extensions the compiler does not support, as opposed to extensions that are unknown to Cabal. M ./Distribution/Simple/Configure.hs -1 +1 View patch online: http://darcs.haskell.org/cabal/_darcs/patches/20080324191421-adfee-08a7a7e3e...