[Freeciv-Dev] (PR#3001) enemy can be in my own trireme

["Guest via RT" <rt@xxxxxxxxxxxxxx>]

sorry for followinf text but i m french so english is not so easy for me.
I played team game and a teammate give me a city which have a trireme.
In this trireme there were a explorer which depend on another city.
The trireme come to my nation, but the explorer stay for his nation so
i could use the 2 place inside the boat. AI was then set for this nation.
So i have a AI-explorer in my boat.I can't kill him without losing the
trireme.
Maybe the unity which depend on a city should not be given when in a
meeting city are offer.