portal_synchronizations is not mandatory in an erp5 site.

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@11990 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5/ERP5Site.py

@@ -1148,10 +1148,13 @@ class ERP5Generator(PortalGenerator):
     if not p.hasObject('portal_preferences'):
       addTool('ERP5 Preference Tool', None)
 
+    try:
       # Add ERP5SyncML Tools
       addTool = p.manage_addProduct['ERP5SyncML'].manage_addTool
       if not p.hasObject('portal_synchronizations'):
         addTool('ERP5 Synchronizations', None)
+    except AttributeError:
+      pass
 
     # Add Message Catalog
     if not 'Localizer' in p.objectIds():