proper cleanup of fxMixer and it's view at exit

git-svn-id: https://lmms.svn.sf.net/svnroot/lmms/trunk/lmms@797 0778d3d1-df1d-0410-868b-ea421aaaa00d

src/core/engine.cpp

@@ -117,6 +117,12 @@ void engine::destroy( void )
 	s_pianoRoll = NULL;
 	delete s_automationEditor;
 	s_automationEditor = NULL;
+
+	delete s_fxMixerView;
+	s_fxMixerView = NULL;
+	delete s_fxMixer;
+	s_fxMixer = NULL;
+
 	delete s_ladspaManager;
 
 	presetPreviewPlayHandle::cleanUp();

src/core/fx_mixer.cpp

@@ -60,6 +60,10 @@ struct fxChannel
 		engine::getMixer()->clearAudioBuffer( m_buffer,
 				engine::getMixer()->framesPerPeriod() );
 	}
+	~fxChannel()
+	{
+		delete[] m_buffer;
+	}
 
 	effectChain m_fxChain;
 	bool m_used;
@@ -71,6 +75,7 @@ struct fxChannel
 	floatModel m_volumeModel;
 	QString m_name;
 	QMutex m_lock;
+
 } ;
 
 
@@ -92,6 +97,10 @@ fxMixer::fxMixer() :
 
 fxMixer::~fxMixer()
 {
+	for( int i = 0; i < NUM_FX_CHANNELS+1; ++i )
+	{
+		delete m_fxChannels[i];
+	}
 }