buried ball enhancement (trunk only)

buried ball enhancement (trunk only)

     Make being tethered to a buried iron ball be a bit more interesting
than just being stuck in the floor.  You can now move within a shortened
chain radius (1 step from the ball's burial location rather than normal 2
that applies when it's on the floor).  This has only been modestly tested,
and the message gets to be annoying if you move around a bit while monster
attack and object pickup/drop messages are being delivered.  There ought
to be some better way to override Norep.

     This would work nicer if the chain was actually visible at the ball's
location instead of becoming implicit at the time of burial.  But I don't
want to try to figure out all the ramifications of having an object on
the floor which can't be moved--perhaps uchain handling already suffices,
but I suspect that there's a can of worms waiting to have its lid opened.