PreviousBlockInList  327 magick/memory.c   PreviousBlockInList(block)=previous;
PreviousBlockInList  334 magick/memory.c     PreviousBlockInList(next)=block;
PreviousBlockInList  344 magick/memory.c   previous=PreviousBlockInList(block);
PreviousBlockInList  350 magick/memory.c     PreviousBlockInList(next)=previous;