From 464bdd5d06e2bca01ce4156d6532b185c08ef59d Mon Sep 17 00:00:00 2001
From: Guillermo Gallego <guillermo.gallego@ifi.uzh.ch>
Date: Wed, 24 May 2017 17:50:09 +0200
Subject: [PATCH] fixing bug in dvs_renderer when there are no events. thx Timo

---
 dvs_renderer/src/renderer.cpp | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/dvs_renderer/src/renderer.cpp b/dvs_renderer/src/renderer.cpp
index 1b433d7..afd5abd 100644
--- a/dvs_renderer/src/renderer.cpp
+++ b/dvs_renderer/src/renderer.cpp
@@ -115,7 +115,10 @@ void Renderer::eventsCallback(const dvs_msgs::EventArray::ConstPtr& msg)
   if (image_pub_.getNumSubscribers() > 0)
   {
     cv_bridge::CvImage cv_image;
-    cv_image.header.stamp = msg->events[msg->events.size()/2].ts;
+    if (msg->events.size() > 0)
+    {
+      cv_image.header.stamp = msg->events[msg->events.size()/2].ts;
+    }
 
     if (display_method_ == RED_BLUE)
     {