add IsOk() to all classes having Ok() method (patch 1570985)

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@41751 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/mac/classic/brush.h

@@ -57,7 +57,8 @@ public:
     virtual int GetStyle() const ;
     wxBitmap *GetStipple() const ;
 
-    virtual bool Ok() const { return (m_refData != NULL) ; }
+    virtual bool Ok() const { return IsOk(); }
+    virtual bool IsOk() const { return (m_refData != NULL) ; }
 
 // Implementation