using suppression of idle processing (delayed destruction happened too early eg when showing native message boxes)

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@71779 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/osx/cocoa/msgdlg.mm

@@ -20,6 +20,7 @@
 
 #include "wx/control.h"
 #include "wx/thread.h"
+#include "wx/evtloop.h"
 #include "wx/osx/private.h"
 
 
@@ -61,6 +62,8 @@ wxMessageDialog::~wxMessageDialog()
 
 int wxMessageDialog::ShowModal()
 {
+    wxCFEventLoopPauseObservers pause;
+    
     int resultbutton = wxID_CANCEL;
 
     const long style = GetMessageDialogStyle();