(svn r1612) -Fix: made sure that ->next pointers are set to NULL

order_cmd.c

@@ -89,6 +89,7 @@ static Order *AllocateOrder(void)
 			uint index = order->index;
 			memset(order, 0, sizeof(Order));
 			order->index = index;
+			order->next = NULL;
 			return order;
 		}
 	}

vehicle.c

@@ -192,6 +192,8 @@ static Vehicle *InitializeVehicle(Vehicle *v)
 	v->next = NULL;
 	v->next_hash = 0xffff;
 	v->string_id = 0;
+	v->next_shared = NULL;
+	v->prev_shared = NULL;
 	/* random_bits is used to pick out a random sprite for vehicles
 	    which are technical the same (newgrf stuff).
 	   Because RandomRange() results in desyncs, and because it does