MM_DigitizationTool: Fix clang warnings

Fix clang warnings in MM_DigitizationTool.

/cc @tsulaia

Build area was cleaned as per request posted in the DB. The full software build will be performed

This merge request affects 1 package:

• MuonSpectrometer/MuonPhaseII/MuonDigitization/MmDigitizationR4

This merge request affects 1 file:

• MuonSpectrometer/MuonPhaseII/MuonDigitization/MmDigitizationR4/src/MM_DigitizationTool.cxx

Adding @wleight ,@markowen ,@apsallid ,@jchapman ,@stavrop ,@ddicroce ,@mvozak ,@kluit ,@jojungge ,@pscholer as watchers

added Digitization MuonSpectrometer Upgrade main review-pending-level-1 labels

CI Result SUCCESS (hash 09d79c0a)

	Athena
externals
cmake
make
tests

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merged

mentioned in commit 87a9930e