applied small patch from Relja Stanisavljevic

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@3452 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5Type/ZopePatch.py

@@ -1728,7 +1728,7 @@ Expression.__hash__ = Expression_hash
 
 from Shared.DC.ZRDB.sqlvar import SQLVar
 from Shared.DC.ZRDB import sqlvar
-from string import atoi
+from string import atoi,atof
 
 def SQLVar_render(self, md):
     name=self.__name__