From 234d6cf4318e94b383a56e08cdf777152bf97759 Mon Sep 17 00:00:00 2001
From: Robert Osfield <robert@openscenegraph.com>
Date: Fri, 17 Jun 2016 09:24:13 +0100
Subject: [PATCH] Added if (texture) to fix bug when the dynamic_cast<> returns
 NULL.

---
 src/osg/GraphicsCostEstimator.cpp | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/src/osg/GraphicsCostEstimator.cpp b/src/osg/GraphicsCostEstimator.cpp
index f835cb57c..36fec361e 100644
--- a/src/osg/GraphicsCostEstimator.cpp
+++ b/src/osg/GraphicsCostEstimator.cpp
@@ -233,9 +233,12 @@ public:
         for(unsigned int i=0; i<stateset->getNumTextureAttributeLists(); ++i)
         {
             const osg::Texture* texture = dynamic_cast<const osg::Texture*>(stateset->getTextureAttribute(i, osg::StateAttribute::TEXTURE));
-            CostPair cost = _gce->estimateCompileCost(texture);
-            _costs.first += cost.first;
-            _costs.second += cost.second;
+            if (texture)
+            {
+                CostPair cost = _gce->estimateCompileCost(texture);
+                _costs.first += cost.first;
+                _costs.second += cost.second;
+            }
         }
     }