Fix longstanding physical sleep issue...

Only put dynamics to sleep if they're at the initial location. This prevents baskets from exploding on touch by an avatar and should theoretically make the doggone slave cave kickables activate the pressure plates.

See also:
http://forum.guildofwriters.org/viewtopic.php?p=66694#p66694
http://forum.guildofwriters.org/viewtopic.php?p=57170#p57170