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/bitmap.h

@@ -168,7 +168,8 @@ public:
   // copies the contents and mask of the given (colour) icon to the bitmap
   virtual bool CopyFromIcon(const wxIcon& icon);
 
-  bool Ok() const;
+  bool Ok() const { return IsOk(); }
+  bool IsOk() const;
   int GetWidth() const;
   int GetHeight() const;
   int GetDepth() const;