HPCC-8944 Add missing case entry for record calculation

Signed-off-by: Gavin Halliday <gavin.halliday@lexisnexis.com>
Merge pull request #4081 from ghalliday/issue8944

HPCC-8944 Add missing case entry for record calculation

Reviewed-By: Richard Chapman <rchapman@hpccsystems.com>