Misplaced target rocks that land in throwzone cause trouble

[ebrahimebrahim]

Two issues observed with them:

1. They cannot be picked up. They yell at you and say "no picking up rocks beyond the line of pebbles!"
2. They screw up the count of remaining throwable rocks. This can put the game in an un-endable state

Once a rock is knocked, the previously misplaced rocks become holdable, but the count of remaining throwable rocks is screwed up.