erp5_core: Base_getWorkflowHistoryItemList get object reference instead ot id...

erp5_core: Base_getWorkflowHistoryItemList get object reference instead ot id to generate workflow history.

product/ERP5/bootstrap/erp5_core/SkinTemplateItem/portal_skins/erp5_core/Base_getWorkflowHistoryItemList.xml

@@ -111,7 +111,7 @@ for workflow_item in workflow_item_list:\n
         key = key[len(compatibility_name):]\n
     if key == wf_state_var: \n
       # Store locally the id of state, usefull for merging action and transition\n
-      state_id = wf_states.get(value, marker) and wf_states[value].id\n
+      state_id = wf_states.get(value, marker) and wf_states[value].getReference()\n
       o.setProperty(\'state_id\', state_id)\n
 \n
       key = \'state\'\n