Also replace data value when it's None (fixes r2273).

Otherwise, None ends up being put in object cache, which fails.

git-svn-id: https://svn.erp5.org/repos/neo/trunk@2280 71dcc9de-d417-0410-9af5-da40c76e7ee4

neo/client/app.py

@@ -605,7 +605,7 @@ class Application(object):
         if data is None or data_serial is not None:
             assert data is None or data_serial is None, data_serial
             # this is a George Bailey object, stored as an empty string
-            compressed_data = ''
+            data = compressed_data = ''
             compression = 0
         else:
             assert data_serial is None