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/dfb/brush.h

@@ -35,7 +35,8 @@ public:
     wxBrush(const wxColour &colour, int style = wxSOLID);
     wxBrush(const wxBitmap &stippleBitmap);
 
-    bool Ok() const;
+    bool Ok() const { return IsOk(); }
+    bool IsOk() const;
     bool operator==(const wxBrush& brush) const;
     bool operator!=(const wxBrush& brush) const { return !(*this == brush); }