Third Party Report: Don't fail if user selects '' in the role list

doc.isMemberOf('') is not valid

bt5/erp5_accounting/SkinTemplateItem/portal_skins/erp5_accounting/AccountModule_getOtherPartiesReportSectionList.xml

@@ -120,8 +120,9 @@ for party in context.Account_zDistinctSectionList(\n
   if role_filter_list:\n
     keep_this_one = False\n
     for role in role_filter_list:\n
-      if o.isMemberOf(role):\n
+      if role and o.isMemberOf(role):\n
         keep_this_one = True\n
+        break\n
 \n
   if not keep_this_one:\n
     continue\n

bt5/erp5_accounting/bt/revision

-1517
+1518
\ No newline at end of file