directly delete view before removing model - fixes crash when removing instrument-track with instrument-track-window open

git-svn-id: https://lmms.svn.sf.net/svnroot/lmms/trunk/lmms@923 0778d3d1-df1d-0410-868b-ea421aaaa00d

src/core/track.cpp

@@ -1172,10 +1172,10 @@ void trackOperationsWidget::cloneTrack( void )
 void trackOperationsWidget::removeTrack( void )
 {
 	m_trackView->close();
+	delete m_trackView;
 	engine::getMixer()->lock();
 	delete m_trackView->getTrack();
 	engine::getMixer()->unlock();
-	m_trackView->deleteLater();
 }