[C2hs] patch applied (c2hs): Allow both + and - prefix on exponent part of float literals

[Duncan Coutts]

Sun Mar 25 06:03:30 PDT 2007  Duncan Coutts <duncan.coutts at worc.ox.ac.uk>
  * Allow both + and - prefix on exponent part of float literals

    M ./c2hs/c/CLexer.x -1 +1