From 030f785e0a9f63b99e684b5ea9ecd0706e6873c9 Mon Sep 17 00:00:00 2001
From: Rein Appeldoorn <rein.appeldoorn@nobleo.nl>
Date: Mon, 25 Nov 2024 14:51:52 +0100
Subject: [PATCH] fix(pointcloud2): do not crash on empty pointcloud

Fixes #85
---
 rosboard/serialization.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/rosboard/serialization.py b/rosboard/serialization.py
index 80294e66..54d7f0ec 100644
--- a/rosboard/serialization.py
+++ b/rosboard/serialization.py
@@ -62,7 +62,7 @@ def ros2dict(msg):
         # PointCloud2: extract only necessary fields, reduce precision
         if (msg.__module__ == "sensor_msgs.msg._PointCloud2" or \
             msg.__module__ == "sensor_msgs.msg._point_cloud2") \
-            and field == "data":
+            and field == "data" and msg.data:
             rosboard.compression.compress_point_cloud2(msg, output)
             continue