DCMathSegmentMaker: Fix cppcheck warnings.

Fix cppcheck warnings.

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

132K in file MuonSpectrometer/MuonReconstruction/MuonSegmentMakers/MuonSegmentMakerTools/DCMathSegmentMaker/src/DCMathSegmentMaker.cxx

This merge request affects 1 package:

• MuonSpectrometer/MuonReconstruction/MuonSegmentMakers/MuonSegmentMakerTools/DCMathSegmentMaker

This merge request affects 3 files:

• MuonSpectrometer/MuonReconstruction/MuonSegmentMakers/MuonSegmentMakerTools/DCMathSegmentMaker/src/DCMathSegmentMaker.cxx
• MuonSpectrometer/MuonReconstruction/MuonSegmentMakers/MuonSegmentMakerTools/DCMathSegmentMaker/src/DCMathSegmentMaker.h
• MuonSpectrometer/MuonReconstruction/MuonSegmentMakers/MuonSegmentMakerTools/DCMathSegmentMaker/src/MuonClusterSegmentFinderTool.cxx

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

added MuonSpectrometer master review-pending-level-1 labels

CI Result SUCCESS (hash 9b703661)

	Athena	AthSimulation	AthGeneration	AnalysisBase	AthAnalysis
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
For experts only: Jenkins output [CI-MERGE-REQUEST-CC7 28893]

changes look fine, tests pass. L1 approving.

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

merged

mentioned in commit 107cbdf8

added sweep:ignore label