From 43358a24183cc9b03bde55f3430a56da6c1a1932 Mon Sep 17 00:00:00 2001
From: James Turner <zakalawe@mac.com>
Date: Sat, 21 Dec 2013 15:31:10 +0000
Subject: [PATCH] Fix a crash where we show a message-box on start.

Don't assume we got as far as creating a viewer when destroying
the renderer.
---
 src/Viewer/renderer.cxx | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/Viewer/renderer.cxx b/src/Viewer/renderer.cxx
index cc47f80b3..d982056e0 100644
--- a/src/Viewer/renderer.cxx
+++ b/src/Viewer/renderer.cxx
@@ -433,7 +433,8 @@ FGRenderer::~FGRenderer()
     }
     
     // replace the viewer's scene completely
-    getViewer()->setSceneData(new osg::Group);
+    if (getViewer())
+        getViewer()->setSceneData(new osg::Group);
     
     
 #ifdef FG_JPEG_SERVER
-- 
2.39.5