From a44f9f6c9032aa5cbff35311db140245d9120082 Mon Sep 17 00:00:00 2001
From: Jack Grigg <jack@z.cash>
Date: Thu, 23 Aug 2018 14:25:41 +0100
Subject: [PATCH] Fix chunk() output when given zero-length data

---
 tv_output.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/tv_output.py b/tv_output.py
index ce63ad8..fcb225d 100644
--- a/tv_output.py
+++ b/tv_output.py
@@ -8,7 +8,8 @@ import json
 
 def chunk(h):
     hstr = str(h, 'utf-8')
-    return '0x' + ', 0x'.join([hstr[i:i+2] for i in range(0, len(hstr), 2)])
+    hstr = ', 0x'.join([hstr[i:i+2] for i in range(0, len(hstr), 2)])
+    return '0x' + hstr if hstr else ''
 
 class Some(object):
     def __init__(self, thing):