Change: make crash chance at short runway independent of plane crash rate setting (there's a cheat for this)

src/aircraft_cmd.cpp

@@ -1309,18 +1309,17 @@ static void CrashAirplane(Aircraft *v)
  */
 static void MaybeCrashAirplane(Aircraft *v)
 {
-	if (_settings_game.vehicle.plane_crashes == 0) return;
 
 	Station *st = Station::Get(v->targetairport);
 
-	/* FIXME -- MaybeCrashAirplane -> increase crashing chances of very modern airplanes on smaller than AT_METROPOLITAN airports */
-	uint32 prob = (0x4000 << _settings_game.vehicle.plane_crashes);
+	uint32 prob;
 	if ((st->airport.GetFTA()->flags & AirportFTAClass::SHORT_STRIP) &&
 			(AircraftVehInfo(v->engine_type)->subtype & AIR_FAST) &&
 			!_cheats.no_jetcrash.value) {
-		prob /= 20;
+		prob = 3276;
 	} else {
-		prob /= 1500;
+		if (_settings_game.vehicle.plane_crashes == 0) return;
+		prob = (0x4000 << _settings_game.vehicle.plane_crashes) / 1500;
 	}
 
 	if (GB(Random(), 0, 22) > prob) return;

src/lang/english.txt

@@ -1257,8 +1257,8 @@ STR_CONFIG_SETTING_PLANE_SPEED                                  :Plane speed fac
 STR_CONFIG_SETTING_PLANE_SPEED_HELPTEXT                         :Set the relative speed of planes compared to other vehicle types, to reduce the amount of income of transport by aircraft
 STR_CONFIG_SETTING_PLANE_SPEED_VALUE                            :1 / {COMMA}
 STR_CONFIG_SETTING_PLANE_CRASHES                                :Number of plane crashes: {STRING2}
-STR_CONFIG_SETTING_PLANE_CRASHES_HELPTEXT                       :Set the chance of an aircraft crash happening
-STR_CONFIG_SETTING_PLANE_CRASHES_NONE                           :None
+STR_CONFIG_SETTING_PLANE_CRASHES_HELPTEXT                       :Set the chance of a random aircraft crash happening.{}* Large airplanes always have a risk of crashing when landing on small airports
+STR_CONFIG_SETTING_PLANE_CRASHES_NONE                           :None*
 STR_CONFIG_SETTING_PLANE_CRASHES_REDUCED                        :Reduced
 STR_CONFIG_SETTING_PLANE_CRASHES_NORMAL                         :Normal
 STR_CONFIG_SETTING_STOP_ON_TOWN_ROAD                            :Allow drive-through road stops on town owned roads: {STRING2}