Ruins and allies don't appear

[SCIkick]

In the Ladder game "F-WOM" I just explored a Lvl. 3 ruin and it said a Red Dragon is joining me, then the unit never appeared.

[SnotlinG]

Issue is that all valid tiles where taken.
The problem is the system doesnt count shore-tiles etc as valid, even though the ally was Flying.
This is something in my todolist to look into, but currently this is how the code works.

[SnotlinG]

Code has been updated.
From now on if you find Flying allies, they will be able to spawn on all tiles except Volcanic tiles.