From c12538c346ebb10ee884afeb24839264f5809924 Mon Sep 17 00:00:00 2001
From: Randy Heit <rheit@zdoom.fake>
Date: Wed, 14 Sep 2011 23:34:28 +0000
Subject: [PATCH] - Fixed crash when trying to play a MIDI file with no notes.

SVN r3294 (trunk)
---
 src/sound/music_midistream.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/sound/music_midistream.cpp b/src/sound/music_midistream.cpp
index f9c2d4f280..c8c8ab08ed 100644
--- a/src/sound/music_midistream.cpp
+++ b/src/sound/music_midistream.cpp
@@ -339,6 +339,10 @@ void MIDIStreamer::Play(bool looping, int subsong)
 	if (MIDI->Preprocess(this, looping))
 	{
 		StartPlayback();
+		if (MIDI == NULL)
+		{ // The MIDI file had no content and has been automatically closed.
+			return;
+		}
 	}
 
 	if (0 != MIDI->Resume())