From 6ec660ca7e12e2225156ab6e47ddaed7d857ff06 Mon Sep 17 00:00:00 2001
From: Gael Guennebaud <g.gael@free.fr>
Date: Fri, 28 Jan 2011 15:30:33 +0100
Subject: [PATCH] fix crash in autodiff

---
 unsupported/Eigen/src/AutoDiff/AutoDiffScalar.h | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/unsupported/Eigen/src/AutoDiff/AutoDiffScalar.h b/unsupported/Eigen/src/AutoDiff/AutoDiffScalar.h
index 455adcadb..7517035d9 100644
--- a/unsupported/Eigen/src/AutoDiff/AutoDiffScalar.h
+++ b/unsupported/Eigen/src/AutoDiff/AutoDiffScalar.h
@@ -566,6 +566,9 @@ template<typename DerType> struct NumTraits<AutoDiffScalar<DerType> >
 {
   typedef AutoDiffScalar<DerType> NonInteger;
   typedef AutoDiffScalar<DerType>& Nested;
+  enum{
+    RequireInitialization = 1
+  };
 };
 
 }