From f2a66a64fcf92d88e9b56b7b55c63dbbea5f19b9 Mon Sep 17 00:00:00 2001
From: Frank Dellaert <dellaert@gmail.com>
Date: Sun, 4 Sep 2011 01:05:30 +0000
Subject: [PATCH] virtual destructor

---
 gtsam/nonlinear/NonlinearOptimizer.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/gtsam/nonlinear/NonlinearOptimizer.h b/gtsam/nonlinear/NonlinearOptimizer.h
index aec462889..3474ca1d2 100644
--- a/gtsam/nonlinear/NonlinearOptimizer.h
+++ b/gtsam/nonlinear/NonlinearOptimizer.h
@@ -27,6 +27,7 @@ namespace gtsam {
 class NullOptimizerWriter {
 public:
 	NullOptimizerWriter(double error) {}
+	virtual ~NullOptimizerWriter() {}
 	virtual void write(double error) {}
 };