AthenaPoolCnvSvc: Fix clang 10 warning.

Fix warning about deprecated implicit declarations.

This merge request affects 1 package:

• Database/AthenaPOOL/AthenaPoolCnvSvc

Adding @ssnyder ,@mnowak as watchers

added Database master review-pending-level-1 labels

CI Result SUCCESS (hash 3aac68e7)

	Athena	AthSimulation	AnalysisBase	AthGeneration
externals
cmake
make
required tests
optional tests

Full details available on this CI monitor view
Athena: number of compilation errors 0, warnings 7
AthSimulation: number of compilation errors 0, warnings 0
AnalysisBase: number of compilation errors 0, warnings 0
AthGeneration: number of compilation errors 0, warnings 0
For experts only: Jenkins output [CI-MERGE-REQUEST-CC7 16665]

Clear, approving.

Pavol [as L2 MR shifter]

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

merged

mentioned in commit 8833944c

added sweep:ignore label