MissingETPerformance: Fix unchecked StatusCodes

Fix unchecked StatusCodes.

This merge request affects 1 package:

• Reconstruction/MissingETPerformance

Adding @goetz as watcher

added JetEtmiss Reconstruction master review-pending-level-1 labels

CI Result SUCCESS (hash 88b6ab82)

	Athena	AthSimulation
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
For experts only: Jenkins output [CI-MERGE-REQUEST-CC7 10550]

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

merged

mentioned in commit a579618c

added sweep:ignore label