Added virtual destructor to Merge.

glabels/Merge.cpp

@@ -33,6 +33,14 @@ namespace glabels
 	}
 
 
+	///
+	/// Destructor
+	///
+	Merge::~Merge()
+	{
+	}
+
+
 	///
 	/// Set source
 	///

glabels/Merge.h

@@ -50,6 +50,7 @@ namespace glabels
 		/////////////////////////////////
 	protected:
 		Merge( QString id, QString name, SourceType type );
+		virtual ~Merge();
 
 
 		/////////////////////////////////