HPCC-8842 Delete spurious semicolon after an if condition

This wasn't causing any problems - since the condition was always true,
however it would have cored if the input wasn't valid.

Signed-off-by: Gavin Halliday <gavin.halliday@lexisnexis.com>
Merge pull request #4462 from ghalliday/issue8842b

HPCC-8842 Delete spurious semicolon after an if condition

Reviewed-By: Richard Chapman <rchapman@hpccsystems.com>