Handle orders pool with zero orders

generate.py

@@ -32,6 +32,9 @@ def read_config():
     return orders
 
 def generate_order(orders_pool):
+    if len(orders_pool.orders) == 0:
+        return { }
+
     # Do we want to repeat?
     if orders_pool.repeat.count() != 0:
         repeat = orders_pool.repeat.get()