HPCC-11379 Remove uninitialised variable warnings (never actually a problem)

Signed-off-by: Gavin Halliday <gavin.halliday@lexisnexis.com>
Merge pull request #5866 from ghalliday/issue11379

HPCC-11379 Remove uninitialised variable warnings (never actually a problem)

Reviewed-By: Richard Chapman <rchapman@hpccsystems.com>