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

[Duncan Coutts]

Tue Apr 20 15:39:35 PDT 2010  Duncan Coutts <duncan at haskell.org>
  * 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=20100420223935-adfee-e5a505f6d18bf1a455a70f72949acdf5d4bd304b.gz