v0.2.55..v0.2.56 changeset ManualMatchValidator.h

diff --git a/hoot-core/src/main/cpp/hoot/core/ops/ManualMatchValidator.h b/hoot-core/src/main/cpp/hoot/core/ops/ManualMatchValidator.h
index a755741..5f94a34 100644
--- a/hoot-core/src/main/cpp/hoot/core/ops/ManualMatchValidator.h
+++ b/hoot-core/src/main/cpp/hoot/core/ops/ManualMatchValidator.h
@@ -56,6 +56,7 @@ public:
   static std::string className() { return "hoot::ManualMatchValidator"; }
 
   ManualMatchValidator();
+  virtual ~ManualMatchValidator() = default;
 
   /**
    * Validates all manual matches in the map and records the first error found for each element