fixed a strange bug with the expression return here is not None and here or...

fixed a strange bug with the expression return here is not None and here or self.getForm().aq_parent

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@10078 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5Form/ListBox.py

@@ -460,8 +460,10 @@ class ListBoxRenderer:
   def getContext(self):
     """Return the context of rendering this ListBox.
     """
-    here = self.request.get('here')
-    return here is not None and here or self.getForm().aq_parent
+    value = self.request.get('here')
+    if value is None:
+      value = self.getForm().aq_parent
+    return value
 
   getContext = VolatileCachingMethod(getContext)