From d0c341fa479b8c0bf5cde440d18d56c4b5eb5e1d Mon Sep 17 00:00:00 2001
From: James Turner <zakalawe@mac.com>
Date: Tue, 22 Mar 2016 10:42:08 +0000
Subject: [PATCH] Guard against a crash.

---
 src/Viewer/fg_os_osgviewer.cxx | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/Viewer/fg_os_osgviewer.cxx b/src/Viewer/fg_os_osgviewer.cxx
index 498735fed..0799ffe4a 100644
--- a/src/Viewer/fg_os_osgviewer.cxx
+++ b/src/Viewer/fg_os_osgviewer.cxx
@@ -341,11 +341,12 @@ int fgOSMainLoop()
 
 int fgGetKeyModifiers()
 {
-    if (!globals->get_renderer()) { // happens during shutdown
+    FGRenderer* r = globals->get_renderer();
+    if (!r || !r->getEventHandler()) { // happens during shutdown
       return 0;
     }
     
-    return globals->get_renderer()->getEventHandler()->getCurrentModifiers();
+    return r->getEventHandler()->getCurrentModifiers();
 }
 
 void fgWarpMouse(int x, int y)
-- 
2.39.5