Boats in towers bug - IMPLEMENTED v968

[Pepe]

Hi Daniel,

Under the current version, boats can go inside towers, so sometimes when the tower is destroyed, you see boats on land! I happened to me in one game, where there was a castle by the sea, and towers beside the castle, so I could keep on moving boats between towers.

[Stratego (dev)]

ok, i think i will disallow them going into towers (tower, fortress, castle), is that ok?

I implemented it like this.