HPCC-9910 Undefined symbol with dictionary using INTEGER type

Typo in the header file.

Signed-off-by: Richard Chapman <rchapman@hpccsystems.com>
Merge pull request #4772 from richardkchapman/dict-int

HPCC-9910 Undefined symbol with dictionary using INTEGER type

Reviewed-by: Gavin Halliday <ghalliday@hpccsystems.com>