patch applied (ghc): FIX recent PPC crashes introduced by the pointer-tagging patch (I hope)

[Simon Marlow]

Wed Aug  1 07:02:31 PDT 2007  Simon Marlow <simonmar at microsoft.com>
  * FIX recent PPC crashes introduced by the pointer-tagging patch (I hope)
  There was an accidental endian-dependency in changes related to RET_FUN.
  The changes in question weren't strictly necessary - they were left
  over from the original workaround for the compacting GC problems, so
  I've just reverted those changes in this patch, which should hopefully
  fix the PPC problems.

    M ./includes/Closures.h -2 +1
    M ./includes/mkDerivedConstants.c -4
    M ./rts/HeapStackCheck.cmm -19 +5