Add a new 'range' operator: 'neq'.

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@27482 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ZSQLCatalog/SearchKey/SearchKey.py

@@ -39,7 +39,8 @@ single_operator_dict = {
   'min': '>=',
   'max': '<',
   'ngt': '<=',
-  'nlt': '>'
+  'nlt': '>',
+  'neq': '!='
 }
 
 dual_operator_dict = {