patch applied (ghc): FIX #1466 (partly), which was causing concprog001(ghci) to fail

[Simon Marlow]

Tue Sep 11 06:02:28 PDT 2007  Simon Marlow <simonmar at microsoft.com>
  * FIX #1466 (partly), which was causing concprog001(ghci) to fail
  An AP_STACK now ensures that there is at least AP_STACK_SPLIM words of
  stack headroom available after unpacking the payload.  Continuations
  that require more than AP_STACK_SPLIM words of stack must do their own
  stack checks instead of aggregating their stack usage into the parent
  frame.  I have made this change for the interpreter, but not for
  compiled code yet - we should do this in the glorious rewrite of the
  code generator.

    M ./compiler/ghci/ByteCodeGen.lhs -6 +8
    M ./compiler/main/Constants.lhs +7
    M ./includes/Constants.h +7
    M ./rts/Apply.cmm -1 +3