CombinedMuonTrackBuilder: Check pointer equality to avoid occasional double-delete

One of the many possible code-branches in CombinedMuonTrackBuilder::standaloneFit may lead to the two pointer variables "track" and "extrapolated" pointing to the same object. This change fixes the double-delete.

Fixes ATLASRECTS-5839.

WARNING: big files (>100K) are found in the changeset

204K in file Reconstruction/MuonIdentification/MuidTrackBuilder/src/CombinedMuonTrackBuilder.cxx

This merge request affects 1 package:

• Reconstruction/MuonIdentification/MuidTrackBuilder

This merge request affects 1 file:

• Reconstruction/MuonIdentification/MuidTrackBuilder/src/CombinedMuonTrackBuilder.cxx

Adding @goetz ,@rosati ,@nkoehler ,@wleight as watchers

added Reconstruction master review-pending-level-1 labels

CI Result SUCCESS (hash eef57177)

	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 25157]

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

merged

mentioned in commit 4d67e03b

added sweep:ignore label