From 91231b122e31ecfe83b4773a7f278d47f13ccdc9 Mon Sep 17 00:00:00 2001
From: Jeremy Bullock <jcbullock@gmail.com>
Date: Dec 05 2017 16:20:01 +0000
Subject: Merge pull request #1652 from shun-iwasawa/fix_crash_on_changing_scene


Fix Crash on Closing Scene with Floating Selection Remained
---

diff --git a/toonz/sources/tnztools/toolutils.cpp b/toonz/sources/tnztools/toolutils.cpp
index f77ed0d..539b9ba 100644
--- a/toonz/sources/tnztools/toolutils.cpp
+++ b/toonz/sources/tnztools/toolutils.cpp
@@ -101,6 +101,7 @@ void ToolUtils::updateSaveBox(const TXshSimpleLevelP &sl, const TFrameId &fid) {
 
   TImageP img = sl->getFrame(fid, true);  // The image will be modified (it
                                           // should already have been, though)
+  if (!img) return;
   // Observe that the returned image will forcedly have subsampling 1
   ::updateSaveBox(img);