patch applied (ghc): Don't check for swept blocks in -DS.

[Simon Marlow]

Sun Jul 18 15:55:26 PDT 2010  Marco T[_\c3_][_\ba_]lio Gontijo e Silva <marcot at marcot.eti.br>
  * Don't check for swept blocks in -DS.
  
  The checkHeap function assumed the allocated part of the block contained only
  alive objects and slops.  This was not true for blocks that are collected using
  mark sweep.  The code in this patch skip the test for this kind of blocks.

    M ./includes/rts/storage/Block.h +2
    M ./rts/sm/GC.c +4
    M ./rts/sm/Sanity.c -9 +11
    M ./rts/sm/Sweep.c +2

View patch online:
http://darcs.haskell.org/cgi-bin/darcsweb.cgi?r=ghc;a=darcs_commitdiff;h=20100718225526-a39d8-c14722aa06ae2fa17d48d0b5ae604d4e693faebf.gz