Update NswErrorCalibData.cxx to fix cppcheck warning

Update NswErrorCalibData.cxx to fix cppcheck warning

@sroe

This merge request affects 1 package:

• MuonSpectrometer/MuonConditions/MuonCondGeneral/MuonCondData

This merge request affects 1 file:

• MuonSpectrometer/MuonConditions/MuonCondGeneral/MuonCondData/src/NswErrorCalibData.cxx

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

added MuonSpectrometer main review-pending-level-1 labels

CI Result SUCCESS (hash 16724dab)

	Athena
externals
cmake
make
tests

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Athena: number of compilation errors 0, warnings 0
For experts only: Jenkins output [CI-MERGE-REQUEST-EL9 2696]

added review-approved label

removed review-pending-level-1 label

merged

mentioned in commit e8e8c990