Avoid starting a persistence adapter if the broker is stop()ed before once has been created.

git-svn-id: https://svn.apache.org/repos/asf/incubator/activemq/trunk@388081 13f79535-47bb-0310-9956-ffa450edef68

activemq-core/src/main/java/org/apache/activemq/broker/BrokerService.java

@@ -407,8 +407,7 @@ public class BrokerService implements Service {
         VMTransportFactory.stopped(getBrokerName());
 
 
-
-        stopper.stop(getPersistenceAdapter());
+        stopper.stop(persistenceAdapter);
 
         if (broker != null) {
             stopper.stop(broker);