From 7d468e98a04a581caeafb674e0ac4af024552f59 Mon Sep 17 00:00:00 2001
From: Varun Agrawal <varagrawal@gmail.com>
Date: Tue, 9 Nov 2021 14:50:48 -0500
Subject: [PATCH] fix warning

---
 gtsam/nonlinear/GncOptimizer.h | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/gtsam/nonlinear/GncOptimizer.h b/gtsam/nonlinear/GncOptimizer.h
index 3ddaf4820..3025d2468 100644
--- a/gtsam/nonlinear/GncOptimizer.h
+++ b/gtsam/nonlinear/GncOptimizer.h
@@ -142,8 +142,9 @@ class GTSAM_EXPORT GncOptimizer {
    * provides an extra interface for the user to initialize the weightst
    * */
   void setWeights(const Vector w) {
-    if(w.size() != nfg_.size()){
-      throw std::runtime_error("GncOptimizer::setWeights: the number of specified weights"
+    if (size_t(w.size()) != nfg_.size()) {
+      throw std::runtime_error(
+          "GncOptimizer::setWeights: the number of specified weights"
           " does not match the size of the factor graph.");
     }
     weights_ = w;