v0.2.55..v0.2.56 changeset NetworkMergerCreator.h

diff --git a/hoot-core/src/main/cpp/hoot/core/conflate/network/NetworkMergerCreator.h b/hoot-core/src/main/cpp/hoot/core/conflate/network/NetworkMergerCreator.h
index c63af79..27ab42d 100644
--- a/hoot-core/src/main/cpp/hoot/core/conflate/network/NetworkMergerCreator.h
+++ b/hoot-core/src/main/cpp/hoot/core/conflate/network/NetworkMergerCreator.h
@@ -43,6 +43,7 @@ public:
   static std::string className() { return "hoot::NetworkMergerCreator"; }
 
   NetworkMergerCreator();
+  virtual ~NetworkMergerCreator() = default;
 
   virtual bool createMergers(const MatchSet& matches, std::vector<MergerPtr>& mergers) const override;