IDScanHitFilter: Fix clang warning.

clang warning: missing override keyword.

This merge request affects 1 package:

• Trigger/TrigTools/IDScanHitFilter

added Trigger master review-pending-level-1 labels

CI Result SUCCESS

	Athena	AthSimulation
externals
cmake
make
required tests
optional tests

Full details available at NICOS MR-24859-2019-07-13-05-09
Athena: number of compilation errors 0, warnings 0
AthSimulation: number of compilation errors 0, warnings 1
For experts only: Jenkins output [CI-MERGE-REQUEST-CC7 1128]

ok, AthSimulation compile warning not related to this, L1 approving

added review-approved label

removed review-pending-level-1 label

merged

mentioned in commit 6edcdbab

added sweep:ignore label