patch applied (ghc): lag/drag/void profiling fix

[Simon Marlow]

Thu Feb 23 07:50:46 PST 2006  Simon Marlow <simonmar at microsoft.com>
  * lag/drag/void profiling fix
  
  We were searching the wrong part of the heap for dead objects, this
  was broken by recent changes to the step structure: from-space is now
  in step->old_blocks, not step->blocks.  Fortunately some assertions in
  ProfHeap picked up the problem.

    M ./ghc/rts/LdvProfile.c -1 +1