From 3456434e37755eb3166fa839bb610538f5fdd46b Mon Sep 17 00:00:00 2001
From: Tim Moore <timoore@redhat.com>
Date: Fri, 18 Sep 2009 15:43:46 +0200
Subject: [PATCH] check for null effect in EffectCullVisitor

An EffectGeode might not have any effect.
---
 simgear/scene/material/EffectCullVisitor.cxx | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/simgear/scene/material/EffectCullVisitor.cxx b/simgear/scene/material/EffectCullVisitor.cxx
index a1a4fa82..62952a9f 100644
--- a/simgear/scene/material/EffectCullVisitor.cxx
+++ b/simgear/scene/material/EffectCullVisitor.cxx
@@ -54,8 +54,9 @@ void EffectCullVisitor::apply(osg::Geode& node)
         CullVisitor::apply(node);
         return;
     }
-    Technique* technique = eg->getEffect()->chooseTechnique(&getRenderInfo());
-    if (!technique) {
+    Effect* effect = eg->getEffect();
+    Technique* technique = 0;
+    if (!(effect && (technique = effect->chooseTechnique(&getRenderInfo())))) {
         CullVisitor::apply(node);
         return;
     }
-- 
2.39.5