[soc2009/multidb] Fixed test failures that were introduced in r10943

git-svn-id: http://code.djangoproject.com/svn/django/branches/soc2009/multidb@10951 bcc190cf-cafb-0310-a4f2-bffc1f526a37

django/db/models/sql/query.py

@@ -746,7 +746,7 @@ class BaseQuery(object):
 
         result.extend([
             '%s%s' % (
-                aggregate.as_sql(quote_func=qn),
+                aggregate.as_sql(qn, self.connection),
                 alias is not None and ' AS %s' % qn(alias) or ''
             )
             for alias, aggregate in self.aggregate_select.items()