patch applied (ghc-6.6/ghc): HANDLE --> (void *), we can' t rely on having included windows.h here

[Ian Lynagh]

Wed Apr  4 01:40:18 PDT 2007  Simon Marlow <simonmar at microsoft.com>
  * HANDLE --> (void *), we can't rely on having included windows.h here
  HANDLE is defined to be (void *) anyway, so this shouldn't hurt

    M ./includes/RtsExternal.h -1 +1