MuonGeoModelTest: Fix cppcheck warnings.

Uninitialized variable. throw without exception.

This merge request affects 1 package:

• MuonSpectrometer/MuonGeoModelTest

This merge request affects 2 files:

• MuonSpectrometer/MuonGeoModelTest/src/MuonGMCheck.cxx
• MuonSpectrometer/MuonGeoModelTest/test/CheckDifferences.cxx

Adding @rosati ,@wleight ,@stavrop ,@jojungge ,@apsallid ,@pscholer as watchers

added MuonSpectrometer master review-pending-level-1 labels

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

204K in file MuonSpectrometer/MuonGeoModelTest/src/MuonGMCheck.cxx

CI Result SUCCESS (hash c4c86a93)

	Athena	AthSimulation
externals
cmake
make
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
For experts only: Jenkins output [CI-MERGE-REQUEST-CC7 64920]

The changes are fine and there are no CI issues. Approving.

Jason (L1)

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

merged

mentioned in commit 527a7f80

added sweep:ignore label