Fix GenEventCnv_p1 for HepMC3 (one line)

Fix GenEventCnv_p1 for HepMC3 (one line)

This merge request affects 1 package:

• Generators/GeneratorObjectsTPCnv

This merge request affects 1 file:

• Generators/GeneratorObjectsTPCnv/src/GenEventCnv_p1.cxx

added Generators master review-pending-level-1 labels

CI Result SUCCESS (hash 6c2af30b)

	Athena	AthSimulation	AthGeneration	AnalysisBase	AthAnalysis	DetCommon
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
AthAnalysis: number of compilation errors 0, warnings 0
DetCommon: number of compilation errors 0, warnings 0
For experts only: Jenkins output [CI-MERGE-REQUEST-CC7 30915]

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

merged

mentioned in commit d2e7ecf1

added sweep:ignore label