AI logic - stop building knight huts when nearly out of knights

[tlongstretch]

At some point need to add some emergency fallback like burning the least important knight huts, or stopping once iron and coal are found in borders and knights are < medium level

[tlongstretch]

done

// don't expand borders if running out of knights AND already have all 3 mine types unsigned int idle_knights = serfs_idle[Serf::TypeKnight0] + serfs_idle[Serf::TypeKnight1] + serfs_idle[Serf::TypeKnight2] + serfs_idle[Serf::TypeKnight3] + serfs_idle[Serf::TypeKnight4]; if (idle_knights <= knights_min) { AILogDebug["util_expand_borders"] << name << " running low on idle_knights, checking to see if already have all three mine types"; if (realm_building_count[Building::TypeCoalMine] > 0 && realm_building_count[Building::TypeIronMine] > 0 && realm_building_count[Building::TypeGoldMine] > 0){ AILogDebug["util_expand_borders"] << name << " running low on idle_knights and have at least one of each mine type, not expanding borders"; return stopbuilding_pos; } }