From a2cbf3f2858bb407041383fdf711cf3d634f3562 Mon Sep 17 00:00:00 2001
From: David Capello <davidcapello@gmail.com>
Date: Wed, 22 Apr 2015 19:35:06 -0300
Subject: [PATCH] Fix crash using --trim without --split-layers

---
 src/app/document_exporter.cpp | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/src/app/document_exporter.cpp b/src/app/document_exporter.cpp
index 6f00671db..e8f63a260 100644
--- a/src/app/document_exporter.cpp
+++ b/src/app/document_exporter.cpp
@@ -395,10 +395,13 @@ void DocumentExporter::captureSamples(Samples& samples)
         doc::color_t refColor = 0;
 
         if (m_trimCels) {
-          if (layer->isBackground())
+          if (sprite->backgroundLayer() &&
+              sprite->backgroundLayer()->isVisible()) {
             refColor = get_pixel(sampleRender, 0, 0);
-          else
+          }
+          else {
             refColor = sprite->transparentColor();
+          }
         }
         else if (m_ignoreEmptyCels)
           refColor = sprite->transparentColor();