Aircraft not blocked by buildings

[Rodrigo Gonzales]

Suppose you have a building which is pretty tall, and an aircraft type that is pretty low-flying. The aircraft will fly *through* the building, entirely ignoring it on its pathfinding decision. Not sure if this is a bug or just a minor annoying behaviour, but it would make sense for the aircraft to either crash, or treat a building in its flight path the same way as a ground unit would.