declare getPreference public, because you don't need to view the preference tool to call it.

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@15781 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5Form/PreferenceTool.py

@@ -180,7 +180,7 @@ class PreferenceTool(BaseTool):
           ['Member', 'Auditor', 'Manager'])
     BaseTool.inheritedAttribute('manage_afterAdd')(self, item, container)
 
-  security.declareProtected(Permissions.View, "getPreference")
+  security.declarePublic('getPreference')
   def getPreference(self, pref_name, default=_marker) :
     """ get the preference on the most appopriate Preference object. """
     method = getattr(self, 'get%s' % convertToUpperCase(pref_name), None)