usagestatistics: Use all_nodes, all_links

Author: ales-erjavec

orangecanvas/document/usagestatistics.py

@@ -387,11 +387,11 @@ def log_scheme(self, scheme):
         self.begin_action(ActionType.Load)
 
         # first log nodes
-        for node in scheme.nodes:
+        for node in scheme.all_nodes():
             self.log_node_add(node)
 
         # then log links
-        for link in scheme.links:
+        for link in scheme.all_links():
             self.log_link_add(link)
 
         self.end_action()