fix variable name

git-svn-id: https://svn.erp5.org/repos/neo/branches/prototype3@299 71dcc9de-d417-0410-9af5-da40c76e7ee4

neo/pt.py

@@ -61,7 +61,7 @@ class PartitionTable(object):
     def clear(self):
         """Forget an existing partition table."""
         self.num_filled_rows = 0
-        self.partition_list = [[] for x in xrange(num_partitions)]
+        self.partition_list = [[] for x in xrange(self.np)]
         self.count_dict.clear()
 
     def getNodeList(self):