Fix a memory leak when ola_traffic is run in validation mode.
Merge pull request #517 from nomis52/master

Fix a memory leak when ola_trigger is run in validation mode.
Attempt to fix another memory leak in ola_trigger.
Merge pull request #518 from nomis52/master

Attempt to fix another memory leak in ola_trigger.
Merge pull request #515 from peternewman/e1.37-2

Some general usbdmx tidying up, to ensure this gets merged sooner, to make life easier later on