Fix Ok/IsOk() mess in wxGDIObject-derived classes; also added

wxGDIObject::Create/CloneGDIRefData() and implemented them for (almost) all
ports


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@50727 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/msw/metafile.cpp

@@ -94,6 +94,16 @@ wxMetafile::~wxMetafile()
 {
 }
 
+wxGDIRefData *wxMetafile::CreateGDIRefData() const
+{
+    return new wxMetafileRefData;
+}
+
+wxGDIRefData *wxMetafile::CloneGDIRefData(const wxGDIRefData *data) const
+{
+    return new wxMetafileRefData(wx_static_cast(wxMetafileRefData *, data));
+}
+
 bool wxMetafile::SetClipboard(int width, int height)
 {
 #if !wxUSE_CLIPBOARD