From 8bfecd7e1ec8919cad3c7fe08ef83a2c9cbd1f92 Mon Sep 17 00:00:00 2001
From: Michael Moon <triffid.hunter@gmail.com>
Date: Thu, 7 Oct 2021 12:29:53 +0800
Subject: [PATCH] Add a sanity check to id3_ucs4_length. Issue #6

Signed-off-by: Michael Moon <triffid.hunter@gmail.com>
---
 ucs4.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/ucs4.c b/ucs4.c
index f55f159..9d2e02b 100644
--- a/ucs4.c
+++ b/ucs4.c
@@ -37,6 +37,9 @@ id3_ucs4_t const id3_ucs4_empty[] = { 0 };
  */
 id3_length_t id3_ucs4_length(id3_ucs4_t const *ucs4)
 {
+	if (!ucs4)
+		return 0;
+
   id3_ucs4_t const *ptr = ucs4;
 
   while (*ptr)