From af78dcbe5502b366506fb2a663b9d93af1fb7d58 Mon Sep 17 00:00:00 2001
From: Wolfgang Hess <whess@google.com>
Date: Thu, 20 Oct 2016 12:01:56 +0200
Subject: [PATCH] Fix constness of Submaps to match the new API. (#136)

---
 cartographer_ros/cartographer_ros/node_main.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/cartographer_ros/cartographer_ros/node_main.cc b/cartographer_ros/cartographer_ros/node_main.cc
index 0b1707b..10a6612 100644
--- a/cartographer_ros/cartographer_ros/node_main.cc
+++ b/cartographer_ros/cartographer_ros/node_main.cc
@@ -297,7 +297,7 @@ bool Node::HandleSubmapQuery(
 
   carto::common::MutexLocker lock(&mutex_);
   // TODO(hrapp): return error messages and extract common code from MapBuilder.
-  carto::mapping::Submaps* const submaps =
+  const carto::mapping::Submaps* const submaps =
       map_builder_.GetTrajectoryBuilder(kTrajectoryBuilderId)->submaps();
   if (request.submap_id < 0 || request.submap_id >= submaps->size()) {
     return false;