Stop to use recursive call.

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@15560 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5/bootstrap/erp5_xhtml_style/SkinTemplateItem/portal_skins/erp5_xhtml_style/Form_getListbox.xml

@@ -86,7 +86,8 @@ def isListBox(field):\n
     return True\n
   elif field.meta_type==\'ProxyField\':\n
     template_field = field.getRecursiveTemplateField()\n
-    return isListBox(template_field)\n
+    if template_field.meta_type==\'ListBox\':\n
+      return True\n
   return False\n
 \n
 # we start with \'bottom\' because most of the time\n