v0.2.55..v0.2.56 changeset ElementReplacer.h

diff --git a/hoot-core/src/main/cpp/hoot/core/ops/ElementReplacer.h b/hoot-core/src/main/cpp/hoot/core/ops/ElementReplacer.h
index 38923f9..04839d0 100644
--- a/hoot-core/src/main/cpp/hoot/core/ops/ElementReplacer.h
+++ b/hoot-core/src/main/cpp/hoot/core/ops/ElementReplacer.h
@@ -44,8 +44,9 @@ public:
 
   static std::string className() { return "hoot::ElementReplacer"; }
 
-  ElementReplacer();
-  ElementReplacer(OsmMapPtr mapToReplaceFrom);
+  ElementReplacer() = default;
+  ElementReplacer(OsmMapPtr mapToReplaceFrom) : _mapToReplaceFrom(mapToReplaceFrom) { }
+  virtual ~ElementReplacer() = default;
 
   /**
    * @see OsmMapOperation