JVT: Fix pointer initialization and destructor

Reconstruction/Jet/JetMomentTools/JetMomentTools/JetVertexTaggerTool.h

@@ -85,7 +85,7 @@ public:
   JetVertexTaggerTool(const std::string& name);
 
   // Destructor
-  ~JetVertexTaggerTool();
+  virtual ~JetVertexTaggerTool();
 
   // Initialization.
   StatusCode initialize() override;

Reconstruction/Jet/JetMomentTools/Root/JetVertexTaggerTool.cxx

@@ -20,7 +20,8 @@ using xAOD::JetFourMom_t;
 //**********************************************************************
 
 JetVertexTaggerTool::JetVertexTaggerTool(const std::string& name)
-: asg::AsgTool(name)
+: asg::AsgTool(name),
+  m_jvthisto(nullptr)
 {
 }