v0.2.55..v0.2.56 changeset CropCmd.cpp

diff --git a/hoot-core/src/main/cpp/hoot/core/cmd/CropCmd.cpp b/hoot-core/src/main/cpp/hoot/core/cmd/CropCmd.cpp
index faf49da..0811e78 100644
--- a/hoot-core/src/main/cpp/hoot/core/cmd/CropCmd.cpp
+++ b/hoot-core/src/main/cpp/hoot/core/cmd/CropCmd.cpp
@@ -51,7 +51,7 @@ public:
 
   static string className() { return "hoot::CropCmd"; }
 
-  CropCmd() {}
+  CropCmd() = default;
 
   virtual QString getName() const override { return "crop"; }