(svn r1525) -Codechange: rewrote the _order_array, now it can be made dynamic.

-Codechange: renamed all 'schedule' stuff to 'order(list)'
-Codechange: moved all order-stuff to order_cmd.c / order.h
-Codechange: vehicles that share orders are now linked to eachother
  with next_shared/prev_shared in Vehicle

  Developers: please use AssignOrder to assign data to an order. If not, 
   you _WILL_ make the save-routine to assert!

vehicle_gui.c

@@ -90,14 +90,16 @@ void BuildVehicleList(vehiclelist_d *vl, int type, int owner, int station)
 		const Vehicle *v;
 		FOR_ALL_VEHICLES(v) {
 			if (v->type == type && v->subtype <= subtype) {
-				const Order *ord;
-				for (ord = v->schedule_ptr; ord->type != OT_NOTHING; ++ord)
-					if (ord->type == OT_GOTO_STATION && ord->station == station) {
+				const Order *order;
+
+				FOR_VEHICLE_ORDERS(v, order) {
+					if (order->type == OT_GOTO_STATION && order->station == station) {
 						_vehicle_sort[n].index = v->index;
 						_vehicle_sort[n].owner = v->owner;
 						++n;
 						break;
 					}
+				}
 			}
 		}
 	} else {