From 14cfe7780433f9e25d4d0f8efac50f0f9ba53159 Mon Sep 17 00:00:00 2001
From: Tobias Doerffel <tobias.doerffel@gmail.com>
Date: Sat, 2 Jul 2011 14:41:17 +0200
Subject: [PATCH] InstrumentTrack: make sure m_runningMidiNotes[x] does not
 become negative

Even though there's no known code path for this event to happen we
should always make sure m_runningMidiNotes[x] does not become negative
as this might mess up future key events.
---
 src/tracks/InstrumentTrack.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/tracks/InstrumentTrack.cpp b/src/tracks/InstrumentTrack.cpp
index f7dd7852c..59b4f744f 100644
--- a/src/tracks/InstrumentTrack.cpp
+++ b/src/tracks/InstrumentTrack.cpp
@@ -386,6 +386,7 @@ void InstrumentTrack::processOutEvent( const midiEvent & _me,
 			if( k >= 0 && k < NumKeys &&
 						--m_runningMidiNotes[k] <= 0 )
 			{
+				m_runningMidiNotes[k] = qMax( 0, m_runningMidiNotes[k] );
 				m_instrument->handleMidiEvent(
 	midiEvent( MidiNoteOff, midiPort()->realOutputChannel(), k, 0 ),
 									_time );