Fix stupid typo mistake.

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@44271 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5Type/patches/OFSFolder.py

@@ -52,6 +52,6 @@ def Folder_isERP5SitePresent(self):
       usefull to identify if a erp5 is present already on a Zope
       Setup.
   """
-  return len(self.objectIds("ERP5 Site")) > 1
+  return len(self.objectIds("ERP5 Site")) > 0
 
 Folder.isERP5SitePresent = Folder_isERP5SitePresent