StoreGate: Fix potential deadlock in removeProxy.

In removeProxy(), don't try to get a pointer from a proxy if it's not valid. Doing so may trigger I/O. Besides being useless here, we may get deadlocks if we call into I/O code while holding the SG lock.

See ATEAM-685.

This merge request affects 1 package:

• Control/StoreGate

This merge request affects 1 file:

• Control/StoreGate/src/SGImplSvc.cxx

Adding @ssnyder as watcher

added Core master review-pending-level-1 labels

CI Result SUCCESS (hash 2654d383)

	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 25253]

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

merged

mentioned in commit ba95e963

added sweep:ignore label