3MF: Export initial commit.

code/3DSExporter.cpp

@@ -210,6 +210,12 @@ Discreet3DSExporter:: Discreet3DSExporter(std::shared_ptr<IOStream> outfile, con
     }
 }
 
+// ------------------------------------------------------------------------------------------------
+Discreet3DSExporter::~Discreet3DSExporter() {
+    // empty
+}
+
+
 // ------------------------------------------------------------------------------------------------
 int Discreet3DSExporter::WriteHierarchy(const aiNode& node, int seq, int sibling_level)
 {