QPIDMSG: Fixed bug in iterator when _begin not called
QPIDMSG: Fixed bug in iterator when _begin not called

When not calling begin, the qpidmsg iterator floated off into a position
which was legal in earlier versions of the bridge, but is not any more.
This has now been corrected to use the standard qpidmsg alignment
function.

Signed-off-by: Frank Quinn <8e90d92b6718ce33106d66386b493961926d3d82@gmail.com>

cloudsmith-io/openmama,jacobraj/MAMA,dmagOM/OpenMAMA-dynamic,cloudsmith-io/openmama,philippreston/OpenMAMA,dpauls/OpenMAMA,dmaguire/OpenMAMA,dpauls/OpenMAMA,dpauls/OpenMAMA,dmaguire/OpenMAMA,MattMulhern/OpenMAMA,cloudsmith-io/openmama,cloudsmith-io/openmama,fquinner/OpenMAMA,kuangtu/OpenMAMA,dpauls/OpenMAMA,philippreston/OpenMAMA,dmaguire/OpenMAMA,philippreston/OpenMAMA,cloudsmith-io/openmama,dmagOM/OpenMAMA-dynamic,kuangtu/OpenMAMA,dpauls/OpenMAMA,dmaguire/OpenMAMA,dpauls/OpenMAMA,dmagOM/OpenMAMA-dynamic,philippreston/OpenMAMA,kuangtu/OpenMAMA,cloudsmith-io/openmama,vulcanft/openmama,dmagOM/OpenMAMA-dynamic,MattMulhern/OpenMAMA,fquinner/OpenMAMA,fquinner/OpenMAMA,kuangtu/OpenMAMA,MattMulhern/OpenMAMA,MattMulhern/OpenMAMA,dmaguire/OpenMAMA,vulcanft/openmama,philippreston/OpenMAMA,jacobraj/MAMA,vulcanft/openmama,kuangtu/OpenMAMA,vulcanft/openmama,fquinner/OpenMAMA,dmaguire/OpenMAMA,fquinner/OpenMAMA,dpauls/OpenMAMA,kuangtu/OpenMAMA,jacobraj/MAMA,cloudsmith-io/openmama,jacobraj/MAMA,jacobraj/MAMA,philippreston/OpenMAMA,vulcanft/openmama,fquinner/OpenMAMA,philippreston/OpenMAMA,MattMulhern/OpenMAMA,dmagOM/OpenMAMA-dynamic,MattMulhern/OpenMAMA,kuangtu/OpenMAMA,fquinner/OpenMAMA,vulcanft/openmama,jacobraj/MAMA,dmaguire/OpenMAMA,vulcanft/openmama,dmagOM/OpenMAMA-dynamic,MattMulhern/OpenMAMA