Basic block numbers no longer in sequence

[Jeffrey A Law]

  In message < Pine.LNX.4.10.9909231426430.16980-100000@biriani.cygnus.co.uk >you
 write:
  > The new block reordering code moves whole basic blocks, changing their
  > order.
Yes, but we previously had two blocks and we end up with only one.  We should
be deleting the block structures for the block that we moved (since that is
the one that will be mis-ordered).

If we are not properly removing the block structures for the block that gets
moved, then that is our problem.

jeff