From 3c080a7a0aefec1e9620e3fb399ad280ea4ee5a2 Mon Sep 17 00:00:00 2001
From: Behdad Esfahbod <behdad@behdad.org>
Date: Tue, 7 Mar 2017 18:13:28 -0800
Subject: [PATCH] Fix buffer serialize of empty buffer

Ouch!
---
 src/hb-buffer-serialize.cc | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/hb-buffer-serialize.cc b/src/hb-buffer-serialize.cc
index 63a0f3466..85696c589 100644
--- a/src/hb-buffer-serialize.cc
+++ b/src/hb-buffer-serialize.cc
@@ -311,6 +311,8 @@ hb_buffer_serialize_glyphs (hb_buffer_t *buffer,
   if (!buf_consumed)
     buf_consumed = &sconsumed;
   *buf_consumed = 0;
+  if (buf_size)
+    *buf = '\0';
 
   assert ((!buffer->len && buffer->content_type == HB_BUFFER_CONTENT_TYPE_INVALID) ||
 	  buffer->content_type == HB_BUFFER_CONTENT_TYPE_GLYPHS);