Unloading troops from ships gets some stuck in the water (alpha 4)

[Eric Ladner]

When unloading a decent amount of troops from a ship (> 10), some of them unload off the back of the boat, then are stuck in deep water and can't make the transition from deep to shallow water. The only work around is to re-garrison them in the ship, then unload again so they come off the front of the boat on the shallow side.

A check should be made to ensure they unload in shallow water, or allow transition from deep to shallow water (but not from shallow to deep, since deep is restricted for troops).

[Erik Johansson]

See: ​http://trac.wildfiregames.com/ticket/645