From 19c18634321e5b1eddcd3424d2f018f9785caeac Mon Sep 17 00:00:00 2001
From: Robert Osfield <robert@openscenegraph.com>
Date: Thu, 17 Nov 2005 09:20:58 +0000
Subject: [PATCH] Added (_data || rhs._data) extra qualify to Image::compare is
 data equal test.

---
 src/osg/Image.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/osg/Image.cpp b/src/osg/Image.cpp
index 29b0ac84b..6bca764bf 100644
--- a/src/osg/Image.cpp
+++ b/src/osg/Image.cpp
@@ -102,7 +102,7 @@ int Image::compare(const Image& rhs) const
     COMPARE_StateAttribute_Parameter(_modifiedCount)
 
     // same buffer + same parameters = same image
-    if (_data == rhs._data) return 0;
+    if ((_data || rhs._data) && (_data == rhs._data)) return 0;
 
     // slowest comparison at the bottom!
     COMPARE_StateAttribute_Parameter(getFileName())