minor followup to LUCENE-857, fixing a small mistake in Otis's orriginal commit to ensure that the deprecated QueryFilter still cache's
minor followup to LUCENE-857, fixing a small mistake in Otis's orriginal commit to ensure that the deprecated QueryFilter still cache's

git-svn-id: 4c5078813df38efa56971a28e09a55254294f104@528298 13f79535-47bb-0310-9956-ffa450edef68

apache/solr,apache/solr,apache/solr,apache/solr,apache/solr