ERP5WorkflowTool.py: make universal method return a correct workflow list for a portal type.

product/ERP5/Tool/ERP5WorkflowTool.py

@@ -246,15 +246,13 @@ class ERP5WorkflowTool(BaseTool, OriginalWorkflowTool):
     """
     portal_type = self.getPortalObject().getDefaultModule(portal_type="portal_types")._getOb(portal_type_id, None)
     workflow_list = []
-    if portal_type is None:
-      return workflow_list
+    if portal_type is not None:
       for workflow_id in portal_type.getTypeERP5WorkflowList():
         workflow_list.append(self._getOb(workflow_id))
 
     for wf in self.getWorkflowsFor(portal_type_id):
       if wf is not None:
         workflow_list.append(wf)
-
     return workflow_list
 
   def dc_workflow_asERP5Object(self, container, dc_workflow, temp):