NAME
        RemBob -- Macro to remove a bob from the gel list.
   SYNOPSIS
        RemBob(bob)
        RemBob(struct bob *);
   FUNCTION
        Marks a bob as no-longer-required.  the gels internal code then
        removes the bob from the list of active gels the next time
        drawglist is executed. this is implemented as a macro.
        If the user is double-buffering the bob, it could take two
        calls to drawglist before the bob actually disappears from
        the rastport.
   INPUTS
        bob = pointer to the bob to be removed
   RESULT
   BUGS
   SEE ALSO
        remibob()  drawglist()  graphics/gels.h  graphics/gfxmacros.h