HPCC-9500 ECL Sample in ECL Language Reference does not compile

Signed-off-by: RichardTaylorHPCC <richard.taylor@lexisnexis.com>
Merge pull request #4640 from RichardTaylorHPCC/B9500

HPCC-9500 ECL Sample in ECL Language Reference does not compile

Reviewed-By: Richard Chapman <rchapman@hpccsystems.com>