From 72a80ee8cd8a42ac00d5c8f0458d2ae8a59115da Mon Sep 17 00:00:00 2001
From: Robert Osfield <robert@openscenegraph.com>
Date: Thu, 30 Jun 2016 10:17:23 +0100
Subject: [PATCH] Added handling of null dynamic_cast

---
 src/osgPlugins/OpenFlight/expGeometryRecords.cpp | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/src/osgPlugins/OpenFlight/expGeometryRecords.cpp b/src/osgPlugins/OpenFlight/expGeometryRecords.cpp
index b153e5a7b..0efa055e5 100644
--- a/src/osgPlugins/OpenFlight/expGeometryRecords.cpp
+++ b/src/osgPlugins/OpenFlight/expGeometryRecords.cpp
@@ -889,6 +889,12 @@ FltExportVisitor::writeUVList( int numVerts, const osg::Geometry& geom, unsigned
 void
 FltExportVisitor::handleDrawArrays( const osg::DrawArrays* da, const osg::Geometry& geom, const osg::Geode& geode )
 {
+    if (!da)
+    {
+        OSG_WARN<<"fltexp: Invalid DrawArray pointer"<<std::endl;
+        return;
+    }
+
     GLint first = da->getFirst();
     GLsizei count = da->getCount();
     GLenum mode = da->getMode();
@@ -956,6 +962,12 @@ FltExportVisitor::handleDrawArrays( const osg::DrawArrays* da, const osg::Geomet
 void
 FltExportVisitor::handleDrawArrayLengths( const osg::DrawArrayLengths* dal, const osg::Geometry& geom, const osg::Geode& geode )
 {
+    if (!da;)
+    {
+        OSG_WARN<<"fltexp: Invalid DrawArrayLengths pointer"<<std::endl;
+        return;
+    }
+
     GLint first = dal->getFirst();
     GLenum mode = dal->getMode();