https://issues.apache.org/jira/browse/AMQCPP-454

Check to see if the internal data has been created yet.  

git-svn-id: https://svn.apache.org/repos/asf/activemq/activemq-cpp/branches/activemq-cpp-3.5.x@1442813 13f79535-47bb-0310-9956-ffa450edef68