don't choose nodes for patrol if they're on fire
forgot #ifndef ...
missing class reference?
Patrol AI made to resemble xcom1

Units now patrol to random node on map (respecting scout bit). This is correct
xcom1 behavior according to Volutar.

Additionally, units won't choose their fromNode as a destination. This should
perhaps be expanded.
don't eternally patrol toward an unreachable node
sanity checks
Merge pull request #384 from hmaon/ai_continues

 Patrol AI made to resemble xcom1 + AI tweaks that mysteriously vanished