Code review comment for lp://qastaging/~ed-leafe/nova/scheduler-multifilter

There should probably be a little more validation, but this should work:

=== modified file 'nova/scheduler/base_scheduler.py'
--- nova/scheduler/base_scheduler.py 2011-08-22 18:07:59 +0000
+++ nova/scheduler/base_scheduler.py 2011-09-02 18:34:10 +0000
@@ -36,7 +36,9 @@
     """
     def filter_hosts(self, topic, request_spec, hosts=None):
         """Filter the full host list (from the ZoneManager)"""
- filters = request_spec.get('filter', FLAGS.default_host_filters)
+ filters = request_spec.get('filter', None)
+ if not filters:
+ filters = FLAGS.default_host_filters
         if not isinstance(filters, (list, tuple)):
             filters = [filters]
         if hosts is None: