v0.2.55..v0.2.56 changeset ElementIdToTagValueMapper.h

diff --git a/hoot-core/src/main/cpp/hoot/core/visitors/ElementIdToTagValueMapper.h b/hoot-core/src/main/cpp/hoot/core/visitors/ElementIdToTagValueMapper.h
index cf3e52c..47f52ef 100644
--- a/hoot-core/src/main/cpp/hoot/core/visitors/ElementIdToTagValueMapper.h
+++ b/hoot-core/src/main/cpp/hoot/core/visitors/ElementIdToTagValueMapper.h
@@ -45,7 +45,8 @@ public:
 
   static std::string className() { return "hoot::ElementIdToTagValueMapper"; }
 
-  ElementIdToTagValueMapper();
+  ElementIdToTagValueMapper() = default;
+  virtual ~ElementIdToTagValueMapper() = default;
 
   virtual void visit(const ConstElementPtr& e);