DerivationFrameworkMCTruth clang llvm9 fix warnings on inconsistent enum

/build/atnight/localbuilds/nightlies/master/athena/PhysicsAnalysis/DerivationFramework/DerivationFrameworkMCTruth/src/GenFilterTool.cxx:60:10: warning: comparison of two values with different enumeration types in switch statement ('MCTruthPartClassifier::ParticleOrigin' and 'MCTruthPartClassifier::ParticleType') [-Wenum-compare-switch]
    case Unknown:
         ^~~~~~~

Mentioning @ssnyder who is looking on some of those

This merge request affects 1 file:

• PhysicsAnalysis/DerivationFramework/DerivationFrameworkMCTruth/src/GenFilterTool.cxx

Adding @zmarshal as watcher

added Derivation master review-pending-level-1 labels

CI Result SUCCESS (hash 628160c1)

	Athena	AthSimulation	AthGeneration	AnalysisBase
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
For experts only: Jenkins output [CI-MERGE-REQUEST-CC7 23475]

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

merged

mentioned in commit a9b69df5

added sweep:ignore label