attempt to get the 'new focus' window parameter of a focus kill event set correctly

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@74094 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/osx/cocoa/private.h

@@ -258,6 +258,8 @@ public :
     
     CGWindowLevel   GetWindowLevel() const { return m_macWindowLevel; }
     void            RestoreWindowLevel();
+    
+    static WX_NSResponder GetNextFirstResponder() ;
 protected :
     CGWindowLevel   m_macWindowLevel;
     WXWindow        m_macWindow;