small optimization (getattr only once)

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@41610 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5/Document/SimulationMovement.py

@@ -313,10 +313,10 @@ class SimulationMovement(PropertyRecordableMixin, Movement, ExplainableMixin):
     delivery_value = self.getDeliveryValue()
     if delivery_value is None:
       # If the parent is not an Applied Rule, self does not have the method.
-      if getattr(self, 'getRootAppliedRule', None) is not None:
-        ra = self.getRootAppliedRule()
-      else:
+      getRootAppliedRule = getattr(self, 'getRootAppliedRule', None)
+      if getRootAppliedRule is None:
         return None
+      ra = getRootAppliedRule()
       order = ra.getCausalityValue()
       if order is not None:
         return order