(svn r22915) -Fix (r22743): TTO savegames with any aircraft not in an hangar caused crashes during load

src/aircraft.h

@@ -31,7 +31,7 @@ void GetAircraftSpriteSize(EngineID engine, uint &width, uint &height);
 void UpdateAirplanesOnNewStation(const Station *st);
 void UpdateAircraftCache(Aircraft *v);
 
-void AircraftLeaveHangar(Aircraft *v);
+void AircraftLeaveHangar(Aircraft *v, Direction exit_dir);
 void AircraftNextAirportPos_and_Order(Aircraft *v);
 void SetAircraftPosition(Aircraft *v, int x, int y, int z);
 byte GetAircraftFlyingAltitude(const Aircraft *v);

src/aircraft_cmd.cpp

@@ -1251,15 +1251,17 @@ void AircraftNextAirportPos_and_Order(Aircraft *v)
 /**
  * Aircraft is about to leave the hangar.
  * @param v Aircraft leaving.
+ * @param exit_dir The direction the vehicle leaves the hangar.
+ * @note This function is called in AfterLoadGame for old savegames, so don't rely
+ *       on any data to be valid, especially don't rely on the fact that the vehicle
+ *       is actually on the ground inside a depot.
  */
-void AircraftLeaveHangar(Aircraft *v)
+void AircraftLeaveHangar(Aircraft *v, Direction exit_dir)
 {
-	const Station *st = Station::GetByTile(v->tile);
-
 	v->cur_speed = 0;
 	v->subspeed = 0;
 	v->progress = 0;
-	v->direction = st->airport.GetHangarExitDirection(v->tile);
+	v->direction = exit_dir;
 	v->vehstatus &= ~VS_HIDDEN;
 	{
 		Vehicle *u = v->Next();
@@ -1344,7 +1346,8 @@ static void AircraftEventHandler_InHangar(Aircraft *v, const AirportFTAClass *ap
 		/* airplane goto state takeoff, helicopter to helitakeoff */
 		v->state = (v->subtype == AIR_HELICOPTER) ? HELITAKEOFF : TAKEOFF;
 	}
-	AircraftLeaveHangar(v);
+	const Station *st = Station::GetByTile(v->tile);
+	AircraftLeaveHangar(v, st->airport.GetHangarExitDirection(v->tile));
 	AirportMove(v, apc);
 }
 

src/saveload/vehicle_sl.cpp

@@ -178,7 +178,7 @@ void UpdateOldAircraft()
 				continue;
 			}
 
-			AircraftLeaveHangar(a); // make airplane visible if it was in a depot for example
+			AircraftLeaveHangar(a, a->direction); // make airplane visible if it was in a depot for example
 			a->vehstatus &= ~VS_STOPPED; // make airplane moving
 			UpdateAircraftCache(a);
 			a->cur_speed = a->vcache.cached_max_speed; // so aircraft don't have zero speed while in air