From 8f071e055f433829f2b27d53662a7023ec200bc7 Mon Sep 17 00:00:00 2001
From: Robert Osfield <robert@openscenegraph.com>
Date: Thu, 30 Jun 2016 10:58:17 +0100
Subject: [PATCH] Added handling of false return

---
 src/osgPlugins/dot/BaseDotVisitor.cpp | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/osgPlugins/dot/BaseDotVisitor.cpp b/src/osgPlugins/dot/BaseDotVisitor.cpp
index f0ee16cf0..3aec31ac2 100644
--- a/src/osgPlugins/dot/BaseDotVisitor.cpp
+++ b/src/osgPlugins/dot/BaseDotVisitor.cpp
@@ -132,8 +132,10 @@ namespace osgDot {
         osg::Node* child = node.getChild( i );
         //handleNodeAndTraverse( *child );
         int id2;
-        getOrCreateId( child, id2 );
-        handle( node, *child, id, id2 );
+        if (getOrCreateId( child, id2 ))
+        {
+            handle( node, *child, id, id2 );
+        }
       }
 
     }