Cherry-pick from master commit 4dc26d1 (#5413)

src/core/Song.cpp

@@ -75,6 +75,7 @@ Song::Song() :
 	m_oldTicksPerTact( DefaultTicksPerTact ),
 	m_masterVolumeModel( 100, 0, 200, this, tr( "Master volume" ) ),
 	m_masterPitchModel( 0, -12, 12, this, tr( "Master pitch" ) ),
+	m_nLoadingTrack( 0 ),
 	m_fileName(),
 	m_oldFileName(),
 	m_modified( false ),
@@ -85,6 +86,7 @@ Song::Song() :
 	m_renderBetweenMarkers( false ),
 	m_playing( false ),
 	m_paused( false ),
+	m_savingProject( false ),
 	m_loadingProject( false ),
 	m_isCancelled( false ),
 	m_playMode( Mode_None ),

src/gui/editors/PianoRoll.cpp

@@ -154,6 +154,8 @@ PianoRoll::PianoRoll() :
 	m_zoomingModel(),
 	m_quantizeModel(),
 	m_noteLenModel(),
+	m_scaleModel(),
+	m_chordModel(),
 	m_pattern( NULL ),
 	m_currentPosition(),
 	m_recording( false ),