fix wrong conditions to skip sorting.

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@30448 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5/DeliverySolver/FIFO.py

@@ -85,7 +85,7 @@ class FIFO(DeliverySolver):
     Returns a list of simulation movement sorted from the last order.
     """
     simulation_movement_list = self.simulation_movement_list[:]
-    if len(simulation_movement_list):
+    if len(simulation_movement_list) > 1:
       simulation_movement_list.sort(
         key=lambda x:x.getExplainationValue().getStartDate(), reverse=True)
     return simulation_movement_list

product/ERP5/DeliverySolver/LIFO.py

@@ -48,7 +48,7 @@ class LIFO(FIFO):
     Returns a list of simulation movement sorted from the first order.
     """
     simulation_movement_list = self.simulation_movement_list[:]
-    if len(simulation_movement_list):
+    if len(simulation_movement_list) > 1:
       simulation_movement_list.sort(
         key=lambda x:x.getExplainationValue().getStartDate())
     return simulation_movement_list

product/ERP5/DeliverySolver/MinPrice.py

@@ -73,6 +73,6 @@ class MinPrice(FIFO):
     Returns a list of simulation movement sorted from the lower price.
     """
     simulation_movement_list = self.simulation_movement_list[:]
-    if len(simulation_movement_list):
+    if len(simulation_movement_list) > 1:
       simulation_movement_list.sort(key=lambda x:x.getPrice())
     return simulation_movement_list