unregister the premix proc when you go away

svn-id: r11755

4 files changed, 7 insertions, 2 deletions

diff --git a/sky/music/adlibmusic.cpp b/sky/music/adlibmusic.cpp
index bfb48ec01f..1ce6c3aedf 100644
--- a/sky/music/adlibmusic.cpp
+++ b/sky/music/adlibmusic.cpp
@@ -46,7 +46,7 @@ SkyAdlibMusic::SkyAdlibMusic(SoundMixer *pMixer, SkyDisk *pSkyDisk, OSystem *sys
 
 SkyAdlibMusic::~SkyAdlibMusic(void) {
 
-	_mixer->setupPremix(NULL, NULL);
+	_mixer->setupPremix(0, 0);
 //	YM3812Shutdown();
 }
 
diff --git a/sword1/music.cpp b/sword1/music.cpp
index 5ed0b8e568..8926eb8d46 100644
--- a/sword1/music.cpp
+++ b/sword1/music.cpp
@@ -40,6 +40,10 @@ SwordMusic::SwordMusic(OSystem *system, SoundMixer *pMixer) {
 	assert(_mixer->getOutputRate() == 22050);
 }
 
+SwordMusic::~SwordMusic() {
+	_mixer->setupPremix(0, 0);
+}
+
 void SwordMusic::passMixerFunc(void *param, int16 *buf, uint len) {
 	((SwordMusic*)param)->mixer(buf, len);
 }
diff --git a/sword1/music.h b/sword1/music.h
index d55e96f432..f273faf7cc 100644
--- a/sword1/music.h
+++ b/sword1/music.h
@@ -32,11 +32,11 @@
 #define WAVEHEADERSIZE 0x2C
 
 class SoundMixer;
-//class File;
 
 class SwordMusic {
 public:
 	SwordMusic(OSystem *system, SoundMixer *pMixer);
+	~SwordMusic();
 	void stream(void);
 	void startMusic(int32 tuneId, int32 loopFlag);
 	void fadeDown(void);
diff --git a/sword2/driver/d_sound.cpp b/sword2/driver/d_sound.cpp
index c433620ea6..303fcb5893 100644
--- a/sword2/driver/d_sound.cpp
+++ b/sword2/driver/d_sound.cpp
@@ -140,6 +140,7 @@ Sound::Sound(Sword2Engine *vm) {
 }
 
 Sound::~Sound() {
+	_vm->_mixer->setupPremix(0, 0);
 	if (_mutex)
 		_vm->_system->delete_mutex(_mutex);
 }