HPCC-10136 Fix ECL in FUNCTIONMACRO_Example.ecl

Fixes HPCC-10136

Signed-off-by: Gordon Smith <gordon.smith@lexisnexis.com>
Merge pull request #4962 from GordonSmith/HPCC-10136

HPCC-10136 Fix ECL in FUNCTIONMACRO_Example.ecl

Reviewed-By: Richard Chapman <rchapman@hpccsystems.com>