[C2hs] patch applied (c2hs): Allow nested function definitions (a GNU C extension)

[Duncan Coutts]

Sun Apr 15 00:48:20 PDT 2007  Duncan Coutts <duncan.coutts at worc.ox.ac.uk>
  * Allow nested function definitions (a GNU C extension)
  Just extends the things can can appear in compound statements,
  as well as statements and declarations we can have function definitions
  This GNU C extension is quite rarely used.

    M ./c2hs/c/CAST.hs -7 +22
    M ./c2hs/c/CParser.y -9 +31