HPCC-11504 Referencing memory after freed in ccdqueue.cpp

Picked up by Valgrind, header is invalid after calls to createRoxiePacket in
processMessage()

Signed-off-by: Richard Chapman <rchapman@hpccsystems.com>
Merge pull request #5928 from richardkchapman/corrupt-packet

HPCC-11504 Referencing memory after freed in ccdqueue.cpp

Reviewed-By: Gavin Halliday <gavin.halliday@lexisnexis.com>
Reviewed-By: Richard Chapman <rchapman@hpccsystems.com>