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

include/wx/os2/pen.h

@@ -81,9 +81,6 @@ public:
     inline bool   operator != (const wxPen& rPen) const
         { return !(*this == rPen); }
 
-    virtual bool Ok() const { return IsOk(); }
-    virtual bool IsOk(void) const { return (m_refData != NULL); }
-
     //
     // Override in order to recreate the pen
     //