Update AsgClassificationDecorationAlg.cxx - tool must be private for...

Update AsgClassificationDecorationAlg.cxx - tool must be private for consistency with https://gitlab.cern.ch/atlas/athena/-/blob/main/PhysicsAnalysis/Algorithms/AsgAnalysisAlgorithms/python/AsgAnalysisConfig.py#L380

PhysicsAnalysis/Algorithms/AsgAnalysisAlgorithms/Root/AsgClassificationDecorationAlg.cxx

@@ -13,7 +13,7 @@ namespace CP
 
 AsgClassificationDecorationAlg::AsgClassificationDecorationAlg(const std::string &name,
                                                ISvcLocator *pSvcLocator)
-    : AnaAlgorithm(name, pSvcLocator)
+    : AnaAlgorithm(name, pSvcLocator), m_tool("",this)
 {
   declareProperty ("tool", m_tool, "classification tool");
 }