patch applied (packages/base): Eliminate some warnings

[Ian Lynagh]

Sat Jul 29 15:08:54 PDT 2006  Ian Lynagh <igloo at earth.li>
  * Eliminate some warnings
  Eliminate warnings in the libraries caused by mixing pattern matching
  with numeric literal matching.

    M ./Data/Complex.hs -2 +2
    M ./GHC/Num.lhs -4 +4