Always update cache size when pruning data.

git-svn-id: https://svn.erp5.org/repos/neo/trunk@2551 71dcc9de-d417-0410-9af5-da40c76e7ee4

neo/client/mq.py

@@ -326,7 +326,7 @@ class MQ(object):
                     del data.value
                 if size <= max_size:
                     break
-                self._size = size
+            self._size = size
 
     __setitem__ = store