Fix tile hash cache check warnings when loading very old savegames

See: #648

src/aircraft_cmd.cpp

@@ -1005,12 +1005,12 @@ static bool AircraftController(Aircraft *v)
 		int z = GetSlopePixelZ(x, y) + 1 + afc->delta_z;
 
 		if (z == v->z_pos) {
+			v->UpdatePosition();
 			Vehicle *u = v->Next()->Next();
 
 			/*  Increase speed of rotors. When speed is 80, we've landed. */
 			if (u->cur_speed >= 80) {
 				ClrBit(v->flags, VAF_HELI_DIRECT_DESCENT);
-				v->UpdatePosition();
 				return true;
 			}
 			u->cur_speed += 4;

src/saveload/afterload.cpp

@@ -1218,6 +1218,9 @@ bool AfterLoadGame()
 	/* Force the freeform edges to false for old savegames. */
 	if (IsSavegameVersionBefore(SLV_111)) {
 		_settings_game.construction.freeform_edges = false;
+		for (Vehicle *v : Vehicle::Iterate()) {
+			if (v->tile == 0) v->UpdatePosition();
+		}
 	}
 
 	/* From version 9.0, we update the max passengers of a town (was sometimes negative
@@ -2960,10 +2963,12 @@ bool AfterLoadGame()
 			if (dir == vdir) { // Entering tunnel
 				hidden = frame >= _tunnel_visibility_frame[dir];
 				v->tile = vtile;
+				v->UpdatePosition();
 			} else if (dir == ReverseDiagDir(vdir)) { // Leaving tunnel
 				hidden = frame < TILE_SIZE - _tunnel_visibility_frame[dir];
 				/* v->tile changes at the moment when the vehicle leaves the tunnel. */
 				v->tile = hidden ? GetOtherTunnelBridgeEndOld(vtile) : vtile;
+				v->UpdatePosition();
 			} else {
 				/* We could get here in two cases:
 				 * - for road vehicles, it is reversing at the end of the tunnel

src/settings.cpp

@@ -1678,6 +1678,9 @@ static void UpdateFreeformEdges(int32_t new_value)
 			MakeSea(TileXY(0, i));
 		}
 	}
+	for (Vehicle *v : Vehicle::Iterate()) {
+		if (v->tile == 0) v->UpdatePosition();
+	}
 	MarkWholeScreenDirty();
 }