TrigSteeringEvent: Fix compilation with clang.

operator<< should be defined in the same namespace as the class being output.

This merge request affects 1 package:

• Trigger/TrigEvent/TrigSteeringEvent

This merge request affects 1 file:

• Trigger/TrigEvent/TrigSteeringEvent/TrigSteeringEvent/OnlineErrorCode.h

Adding @rbielski as watcher

added Trigger master review-pending-level-1 labels

CI Result SUCCESS (hash bffd94e3)

	Athena	AthSimulation	AthGeneration	AnalysisBase
externals
cmake
make
required tests
optional tests

Full details available on this CI monitor view
Athena: number of compilation errors 0, warnings 0
AthSimulation: number of compilation errors 0, warnings 0
AthGeneration: number of compilation errors 0, warnings 0
AnalysisBase: number of compilation errors 0, warnings 0
For experts only: Jenkins output [CI-MERGE-REQUEST-CC7 24751]

added review-approved label and removed review-pending-level-1 label

mentioned in commit 443112dc

merged

added sweep:ignore label