From f242f0631b19e4fbb9991ca07c246a1c12af9615 Mon Sep 17 00:00:00 2001
From: "alexey.lysiuk" <alexey.lysiuk@gmail.com>
Date: Tue, 20 Mar 2018 18:01:35 +0200
Subject: [PATCH] Fixed crash in when MP3 length guesstimation failed

https://forum.zdoom.org/viewtopic.php?t=59881
---
 src/sound/musicformats/music_libsndfile.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/sound/musicformats/music_libsndfile.cpp b/src/sound/musicformats/music_libsndfile.cpp
index b87492a4e..3a44d9f56 100644
--- a/src/sound/musicformats/music_libsndfile.cpp
+++ b/src/sound/musicformats/music_libsndfile.cpp
@@ -298,8 +298,9 @@ SndFileSong::SndFileSong(FileReader &reader, SoundDecoder *decoder, uint32_t loo
 	if (!startass) loop_start = Scale(loop_start, SampleRate, 1000);
 	if (!endass) loop_end = Scale(loop_end, SampleRate, 1000);
 
+	const uint32_t sampleLength = (uint32_t)decoder->getSampleLength();
 	Loop_Start = loop_start;
-	Loop_End = clamp<uint32_t>(loop_end, 0, (uint32_t)decoder->getSampleLength());
+	Loop_End = sampleLength == 0 ? loop_end : clamp<uint32_t>(loop_end, 0, sampleLength);
 	Reader = std::move(reader);
 	Decoder = decoder;
 	Channels = iChannels == ChannelConfig_Stereo? 2:1;