use set.intersection because trade phase of a business path can be a list.

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@31146 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5/Document/BusinessProcess.py

@@ -88,8 +88,9 @@ class BusinessProcess(Path, XMLObject):
     result = []
     if len(trade_phase) == 0:
       return self.objectValues(portal_type="Business Path")
+    trade_phase = set(trade_phase)
     for document in self.objectValues(portal_type="Business Path"):
-      if document.getTradePhase() in trade_phase:
+      if trade_phase.intersection(document.getTradePhaseList()):
         result.append(document)
     return result