From b171a28de448dbe1347672044250f8b2ed37df32 Mon Sep 17 00:00:00 2001
From: Manolo Gouy <Manolo>
Date: Mon, 13 Nov 2017 14:43:58 +0000
Subject: MacOS: make -[FLWindowDelegate windowShouldClose:] more robust by
 testing for NULL pointer.

git-svn-id: file:///fltk/svn/fltk/branches/branch-1.4@12559 ea41ed52-d2ee-0310-a9c1-e6b18d33e121
---
 src/Fl_cocoa.mm | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/Fl_cocoa.mm b/src/Fl_cocoa.mm
index 10e727021..1a33422a4 100644
--- a/src/Fl_cocoa.mm
+++ b/src/Fl_cocoa.mm
@@ -1430,8 +1430,8 @@ static FLWindowDelegate *flwindowdelegate_instance = nil;
 - (BOOL)windowShouldClose:(id)fl
 {
   fl_lock_function();
-  Fl::handle( FL_CLOSE, [(FLWindow *)fl getFl_Window] ); // this might or might not close the window
-  fl_unlock_function();
+  Fl_Window *win = [(FLWindow *)fl getFl_Window];
+  if (win) Fl::handle(FL_CLOSE, win); // this might or might not close the window  fl_unlock_function();
   // the system doesn't need to send [fl close] because FLTK does it when needed
   return NO; 
 }
-- 
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