QPID-5216 - Fixed two memory leaks and one uninitialized-data bug.


git-svn-id: https://svn.apache.org/repos/asf/qpid/trunk@1530373 13f79535-47bb-0310-9956-ffa450edef68
QPID-5217 - Brought message and buffer create/destroy functions into compliance with the standard
            create and destroy convention.


git-svn-id: https://svn.apache.org/repos/asf/qpid/trunk@1530376 13f79535-47bb-0310-9956-ffa450edef68
QPID-5217 - Added the missing 'dx' prefix on the hash-table module types and functions.


git-svn-id: https://svn.apache.org/repos/asf/qpid/trunk@1530378 13f79535-47bb-0310-9956-ffa450edef68
NO-JIRA: Stop compile warnings on RHEL5

git-svn-id: https://svn.apache.org/repos/asf/qpid/trunk@1530412 13f79535-47bb-0310-9956-ffa450edef68