Added check against null

2016-06-23 17:58:35 +01:00
parent f3fbabd8b3
commit 0e21058d10
1 changed files with 1 additions and 1 deletions
--- a/src/osgUtil/Optimizer.cpp
+++ b/src/osgUtil/Optimizer.cpp
@@ -3218,7 +3218,7 @@ void Optimizer::FlattenBillboardVisitor::process()
            mergeAcceptable = false;
        }

-        if (mergeAcceptable)
+        if (mergeAcceptable && mainGroup)
        {
            osg::Billboard* new_billboard = new osg::Billboard;
            new_billboard->setMode(billboard->getMode());