The default report_path should be none, so the Listbox can select the good default one

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@2618 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5Form/Selection.py

@@ -144,7 +144,7 @@ class Selection(Acquisition.Implicit, Traversable, Persistent):
         self.index = index
         self.domain_path = ('portal_categories',)
         self.domain_list = ()
-        self.report_path = ('portal_categories',)
+        self.report_path = None
         self.report_list = ()
         self.domain = None
         self.report = None