use a list comprehension to instantiate list of partition's rows, othersiwe all

rows are the same rows thanks to implicit pointer


git-svn-id: https://svn.erp5.org/repos/neo/branches/prototype3@297 71dcc9de-d417-0410-9af5-da40c76e7ee4

neo/pt.py

@@ -55,7 +55,7 @@ class PartitionTable(object):
         self.np = num_partitions
         self.nr = num_replicas
         self.num_filled_rows = 0
-        self.partition_list = [[]] * num_partitions
+        self.partition_list = [[] for x in xrange(num_partitions)]
         self.count_dict = {}
 
     def clear(self):