From b51bbaa406ff596ae4693b6a7b9963316449e122 Mon Sep 17 00:00:00 2001
From: Robert Osfield <robert@openscenegraph.com>
Date: Thu, 8 Nov 2012 14:15:59 +0000
Subject: [PATCH] Added check to avoid doing update when the imagesequence is
 empty.

---
 src/osg/ImageSequence.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/osg/ImageSequence.cpp b/src/osg/ImageSequence.cpp
index 6a349d4f4..8faec34e8 100644
--- a/src/osg/ImageSequence.cpp
+++ b/src/osg/ImageSequence.cpp
@@ -254,6 +254,9 @@ void ImageSequence::update(osg::NodeVisitor* nv)
 {
     OpenThreads::ScopedLock<OpenThreads::Mutex> lock(_mutex);
 
+    // if imageDataList is empty then there is nothing update can do.
+    if (_imageDataList.empty()) return;
+
     osg::NodeVisitor::ImageRequestHandler* irh = nv->getImageRequestHandler();
     const osg::FrameStamp* fs = nv->getFrameStamp();