From 1871c7dfea6eaebca98ea89be5e25db0d9b86361 Mon Sep 17 00:00:00 2001
From: Colin Snover
Date: Wed, 29 Nov 2017 19:27:57 -0600
Subject: AUDIO: Fix UB shift of negative integer in AdLib driver

---
 audio/adlib.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'audio')

diff --git a/audio/adlib.cpp b/audio/adlib.cpp
index 3e3f5c047c..fd21eb1537 100644
--- a/audio/adlib.cpp
+++ b/audio/adlib.cpp
@@ -1796,7 +1796,7 @@ void MidiDriver_ADLIB::adlibSetParam(int channel, byte param, int value, bool pr
 			value -= 15;
 		else
 			value -= 383;
-		value <<= 4;
+		value *= 16;
 		_channelTable2[channel] = value;
 		adlibPlayNote(channel, _curNotTable[channel] + value);
 		return;
-- 
cgit v1.2.3