QPID-5388: Segmentation fault when recovering empty queue. The recovery could not handle uninitialized journal files, which exist prior to the first write of a record to the journal. The recovery now correctly utilizes the uninitialized file.

git-svn-id: https://svn.apache.org/repos/asf/qpid/trunk@1547921 13f79535-47bb-0310-9956-ffa450edef68