v0.2.55..v0.2.56 changeset BuildingMerger.cpp

diff --git a/hoot-core/src/main/cpp/hoot/core/conflate/polygon/BuildingMerger.cpp b/hoot-core/src/main/cpp/hoot/core/conflate/polygon/BuildingMerger.cpp
index 10b3058..d2860d7 100644
--- a/hoot-core/src/main/cpp/hoot/core/conflate/polygon/BuildingMerger.cpp
+++ b/hoot-core/src/main/cpp/hoot/core/conflate/polygon/BuildingMerger.cpp
@@ -69,7 +69,8 @@ class DeletableBuildingCriterion : public ElementCriterion
 
 public:
 
-  DeletableBuildingCriterion() {}
+  DeletableBuildingCriterion() = default;
+  virtual ~DeletableBuildingCriterion() = default;
 
   virtual bool isSatisfied(const ConstElementPtr& e) const
   {
@@ -105,11 +106,6 @@ private:
 
 int BuildingMerger::logWarnCount = 0;
 
-BuildingMerger::BuildingMerger() :
-MergerBase()
-{
-}
-
 BuildingMerger::BuildingMerger(const set<pair<ElementId, ElementId>>& pairs) :
 _pairs(pairs),
 _keepMoreComplexGeometryWhenAutoMerging(