PreviousBlockInList  356 magick/memory.c   PreviousBlockInList(block)=previous;
PreviousBlockInList  363 magick/memory.c     PreviousBlockInList(next)=block;
PreviousBlockInList  373 magick/memory.c   previous=PreviousBlockInList(block);
PreviousBlockInList  379 magick/memory.c     PreviousBlockInList(next)=previous;