v0.2.55..v0.2.56 changeset BuildingCriterion.h

diff --git a/hoot-core/src/main/cpp/hoot/core/criterion/BuildingCriterion.h b/hoot-core/src/main/cpp/hoot/core/criterion/BuildingCriterion.h
index 906195f..700a367 100644
--- a/hoot-core/src/main/cpp/hoot/core/criterion/BuildingCriterion.h
+++ b/hoot-core/src/main/cpp/hoot/core/criterion/BuildingCriterion.h
@@ -44,8 +44,9 @@ public:
 
   static std::string className() { return "hoot::BuildingCriterion"; }
 
-  BuildingCriterion();
-  BuildingCriterion(ConstOsmMapPtr map);
+  BuildingCriterion() = default;
+  BuildingCriterion(ConstOsmMapPtr map) : _map(map) { }
+  virtual ~BuildingCriterion() = default;
 
   bool isParentABuilding(ElementId eid) const;