v0.2.55..v0.2.56 changeset MembersPerRelationVisitor.h

diff --git a/hoot-core/src/main/cpp/hoot/core/visitors/MembersPerRelationVisitor.h b/hoot-core/src/main/cpp/hoot/core/visitors/MembersPerRelationVisitor.h
index dce1678..1ce3aab 100644
--- a/hoot-core/src/main/cpp/hoot/core/visitors/MembersPerRelationVisitor.h
+++ b/hoot-core/src/main/cpp/hoot/core/visitors/MembersPerRelationVisitor.h
@@ -43,6 +43,7 @@ public:
   static std::string className() { return "hoot::MembersPerRelationVisitor"; }
 
   MembersPerRelationVisitor();
+  virtual ~MembersPerRelationVisitor() = default;
 
   virtual void visit(const ConstElementPtr& e) override;