v0.2.55..v0.2.56 changeset ElementVisitorInputStream.h

diff --git a/hoot-core/src/main/cpp/hoot/core/io/ElementVisitorInputStream.h b/hoot-core/src/main/cpp/hoot/core/io/ElementVisitorInputStream.h
index 609ee69..45c27ac 100644
--- a/hoot-core/src/main/cpp/hoot/core/io/ElementVisitorInputStream.h
+++ b/hoot-core/src/main/cpp/hoot/core/io/ElementVisitorInputStream.h
@@ -46,6 +46,7 @@ public:
    */
   ElementVisitorInputStream(const ElementInputStreamPtr& elementSource,
                             const ElementVisitorPtr& visitor);
+  virtual ~ElementVisitorInputStream() = default;
 
   /**
    * @brief close