minor performance enhancement to ItemList.visit

pekkaklarck · pekkaklarck · commit 97ba23b16a27 · 2016-01-13T16:09:17.000+02:00
diff --git a/src/robot/model/itemlist.py b/src/robot/model/itemlist.py
@@ -65,7 +65,7 @@ def clear(self):
         self._items = ()
 
     def visit(self, visitor):
-        for item in self:
+        for item in self._items:
             item.visit(visitor)
 
     def __iter__(self):
