ERP5.Document.BusinessProcess: _getBusinessLinkClosure takes three arguments.

product/ERP5/Document/BusinessProcess.py

@@ -307,7 +307,7 @@ class BusinessProcess(Path, XMLObject):
     # links wich are directly related to the current business link but DO NOT
     # narrow down the explanation else we might narrow down so much that
     # it becomes an empty set
-    closure_process = _getBusinessLinkClosure(explanation, business_link)
+    closure_process = _getBusinessLinkClosure(self, explanation, business_link)
     return closure_process.isTradeStatePartiallyCompleted(explanation,
                                                            predecessor_state)