patch applied (cabal): Better error message when installing for unsupported compilers

Tue Apr 20 15:39:35 PDT 2010 Duncan Coutts * Better error message when installing for unsupported compilers M ./Distribution/Simple/Install.hs -1 +5 View patch online: http://darcs.haskell.org/cgi-bin/darcsweb.cgi?r=cabal;a=darcs_commitdiff;h=2...