use DECLARE_NO_COPY_CLASS() where applicable (patch 633384)

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@18525 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/common/variant.cpp

@@ -1026,6 +1026,8 @@ public:
 
 protected:
     void* m_value;
+
+    DECLARE_NO_COPY_CLASS(wxVariantDataVoidPtr)
 };
 
 IMPLEMENT_DYNAMIC_CLASS(wxVariantDataVoidPtr, wxVariantData)