fix for crash when API not accessible

Author: kenshirothefist

src/NiceHashBotLib/APIWrapper.cs

@@ -1,4 +1,4 @@
-using System;
+using System;
 using System.Collections.Generic;
 using System.Text;
 using System.Net;
@@ -212,6 +212,7 @@ public static List<Order> GetAllOrders(int ServiceLocation, int Algorithm, bool
                     List<Order> MyOrders = GetMyOrders(ServiceLocation, Algorithm);
 
                     // Fill missing data
+                    if (MyOrders!=null)
                     foreach (Order O1 in MyOrders)
                     {
                         foreach (Order O2 in CachedOList[ServiceLocation, Algorithm].OrderList)