QPID-4734: Release builds fail on GCC 4.4.7 / Boost 1.41
Use pragma to turn off unavoidable unitialised variable warning under gcc on RHEL6

git-svn-id: https://svn.apache.org/repos/asf/qpid/trunk@1466615 13f79535-47bb-0310-9956-ffa450edef68