support for default key handling (escape,enter,command-period) even if there is no control on the frame/dialog, that has the focus

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@36363 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/mac/carbon/toplevel.cpp

@@ -170,8 +170,8 @@ static pascal OSStatus KeyboardEventHandler( EventHandlerCallRef handler , Event
     // FindFocus does not return the actual focus window,but the enclosing window
     wxWindow* focus = wxWindow::DoFindFocus();
     if ( focus == NULL )
-        return result ;
-
+        focus = (wxTopLevelWindowMac*) data ;
+    
     unsigned char charCode ;
     wxChar uniChar = 0 ;
     UInt32 keyCode ;