Sync with FPS head.

Sync with FPS head.

Mon May  8 10:40:14 EST 2006  Don Stewart <dons@cse.unsw.edu.au>
  * Fix all uses for Int that should be CInt or CSize in ffi imports.
  Spotted by Igloo, dcoutts

Mon May  8 16:09:41 EST 2006  Don Stewart <dons@cse.unsw.edu.au>
  * Import nicer loop/loop fusion rule from ghc-ndp

Mon May  8 17:36:07 EST 2006  Don Stewart <dons@cse.unsw.edu.au>
  * Fix stack leak in split on > 60M strings

Mon May  8 17:50:13 EST 2006  Don Stewart <dons@cse.unsw.edu.au>
  * Try same fix for stack overflow in elemIndices