From 97c95ab49132ec7aec790ba419cf507fd467ea58 Mon Sep 17 00:00:00 2001
From: Robert Osfield <robert@openscenegraph.com>
Date: Thu, 23 Jun 2016 16:48:00 +0100
Subject: [PATCH] Added check for null

---
 src/osgViewer/ScreenCaptureHandler.cpp | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/osgViewer/ScreenCaptureHandler.cpp b/src/osgViewer/ScreenCaptureHandler.cpp
index 27a8eb3e6..b02753b9c 100644
--- a/src/osgViewer/ScreenCaptureHandler.cpp
+++ b/src/osgViewer/ScreenCaptureHandler.cpp
@@ -747,7 +747,10 @@ osg::Camera* ScreenCaptureHandler::findAppropriateCameraForCallback(osgViewer::V
 // of that view's graphics contexts.
 bool ScreenCaptureHandler::handle(const osgGA::GUIEventAdapter& ea, osgGA::GUIActionAdapter& aa)
 {
-    osgViewer::ViewerBase* viewer = dynamic_cast<osgViewer::View*>(&aa)->getViewerBase();
+    osgViewer::View* view = dynamic_cast<osgViewer::View*>(&aa);
+    if (!view) return false;
+
+    osgViewer::ViewerBase* viewer = view->getViewerBase();
     if (!viewer) return false;
 
     switch(ea.getEventType())