bug fix in wxRegKey::CopyValue()

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@6064 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/msw/registry.cpp

@@ -444,6 +444,11 @@ bool wxRegKey::CopyValue(const wxChar *szValue,
                          wxRegKey& keyDst,
                          const wxChar *szValueNew)
 {
+    if ( !szValueNew ) {
+        // by default, use the same name
+        szValueNew = szValue;
+    }
+
     switch ( GetValueType(szValue) ) {
         case Type_String:
             {