tentative fix for BestSize problems (non-native toolbar)

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@35574 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/mac/carbon/toolbar.h

@@ -55,6 +55,7 @@ class WXDLLEXPORT wxToolBar: public wxToolBarBase
     virtual bool Show(bool show = true);
     virtual bool IsShown() const;
     virtual void DoGetSize(int *width, int *height) const;
+    virtual wxSize DoGetBestSize() const ;
     virtual bool Realize();
 
     virtual void SetToolBitmapSize(const wxSize& size);