patch applied (cabal): Improve error messages about programs not being found

[Duncan Coutts]

Tue Oct 19 00:44:36 PDT 2010  Duncan Coutts <duncan at haskell.org>
  * Improve error messages about programs not being found
  Make it clear it is a program we are talking about, not a library.

    M ./Distribution/Simple/Program/Db.hs -4 +7

View patch online:
http://darcs.haskell.org/cgi-bin/darcsweb.cgi?r=cabal;a=darcs_commitdiff;h=20101019074436-adfee-5b812763a505a510cf1be2c36d57aa4c8c81abb4.gz