MST - Small logical bugfix

This is a small logical bugfix which should prevent crashes if muons do not have an ID / MS track and the TurnOffMomCorr property is activated.

This merge request affects 1 package:

• PhysicsAnalysis/MuonID/MuonSelectorTools

This merge request affects 1 file:

• PhysicsAnalysis/MuonID/MuonSelectorTools/Root/MuonSelectionTool.cxx

Adding @stavrop ,@jojungge as watchers

added Analysis analysis-review-required master review-pending-level-1 labels

removed analysis-review-required label

CI Result SUCCESS (hash 5e3463a4)

	Athena	AthSimulation	AthGeneration	AnalysisBase	AthAnalysis	DetCommon
externals
cmake
make
required tests
optional tests

Full details available on this CI monitor view. Check the JIRA CI status board for known problems
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 49793]

lgtm approving -- L1

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

merged

mentioned in commit 3d102592

added sweep:ignore label