(svn r16079) -Fix [FS#2824]: insanely fast trains would not stop in time for stations

-Fix: insanely fast trains would sometimes 'jump' over waypoints/via stations within a tick, which would cause the order not to be processed causing the train to go in loops until (with luck) it 'hit' the tile

src/train_cmd.cpp

@@ -4375,10 +4375,25 @@ static void TrainLocoHandler(Vehicle *v, bool mode)
 		do {
 			j -= adv_spd;
 			TrainController(v, NULL);
-			/* Don't continue to move if the train crashed. */
-			if (CheckTrainCollision(v)) break;
+
 			/* 192 spd used for going straight, 256 for going diagonally. */
 			adv_spd = (v->direction & 1) ? 192 : 256;
+
+			if (j >= adv_spd) {
+				/* Don't continue to move if the train crashed or isn't moving. */
+				if (CheckTrainCollision(v) || v->cur_speed == 0) break;
+
+				OrderType order_type = v->current_order.GetType();
+				/* Do not skip waypoints (incl. 'via' stations) when passing through at full speed. */
+				if ((order_type == OT_GOTO_WAYPOINT &&
+							v->dest_tile == v->tile) ||
+						(order_type == OT_GOTO_STATION &&
+							(v->current_order.GetNonStopType() & ONSF_NO_STOP_AT_DESTINATION_STATION) &&
+							IsTileType(v->tile, MP_STATION) &&
+							v->current_order.GetDestination() == GetStationIndex(v->tile))) {
+					ProcessOrders(v);
+				}
+			}
 		} while (j >= adv_spd);
 		SetLastSpeed(v, v->cur_speed);
 	}

src/vehicle.cpp

@@ -1514,6 +1514,7 @@ void Vehicle::BeginLoading()
 	InvalidateWindow(WC_STATION_VIEW, this->last_station_visited);
 
 	GetStation(this->last_station_visited)->MarkTilesDirty(true);
+	this->cur_speed = 0;
 	this->MarkDirty();
 }