NAME
       SyncSBitMap --   Syncronize Super bitmap with whatever is
                        in the standard layer bounds.

   SYNOPSIS
       SyncSBitMap( layer )
                      a0

        void SyncSBitMap( struct layer * );

   FUNCTION
       Copy all bits from ClipRects in layer into super bitmap
        bitmap.  this is used for those functions that do not
        want to deal with the cliprect structures but do want
        to be able to work with a SuperBitMap layer.

   INPUTS
        layer - pointer to a layer that has a superbitmap
                The layer should already be locked by the caller.

   RESULT
        After calling this function, the programmer can manipulate
        the bits in the superbitmap associated with the layer.
        Afterwards, the programmer should call copysbitmap to
        copy the bits back into the onscreen layer.

   BUGS

   SEE ALSO
        copysbitmap() graphics/clip.h