From e2369996e262eee82e2a8222fdaec18366adef36 Mon Sep 17 00:00:00 2001
From: wmayer <wmayer@users.sourceforge.net>
Date: Thu, 31 Dec 2015 17:04:56 +0100
Subject: [PATCH] if offscreen rendering for thumbnail fails then only write
 out application icon

---
 src/Gui/Thumbnail.cpp | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/Gui/Thumbnail.cpp b/src/Gui/Thumbnail.cpp
index a3e26f0e7..034715d5c 100644
--- a/src/Gui/Thumbnail.cpp
+++ b/src/Gui/Thumbnail.cpp
@@ -101,10 +101,11 @@ void Thumbnail::SaveDocFile (Base::Writer &writer) const
         }
     }
 
-    if (!img.isNull()) {
-        QPixmap px = Gui::BitmapFactory().pixmap(App::Application::Config()["AppIcon"].c_str());
+    QPixmap px = Gui::BitmapFactory().pixmap(App::Application::Config()["AppIcon"].c_str());
+    if (!img.isNull())
         px = BitmapFactory().merge(QPixmap::fromImage(img),px,BitmapFactoryInst::BottomRight);
 
+    if (!px.isNull()) {
         // according to specification add some meta-information to the image
         uint mt = QDateTime::currentDateTime().toTime_t();
         QString mtime = QString::fromAscii("%1").arg(mt);