Fix order of destruction for sequences.

Timeline/Annotation_Sequence.H

@@ -83,6 +83,8 @@ public:
 
     ~Annotation_Sequence ( )
         {
+            track()->remove( this );
+
             log_destroy();
         }
 

Timeline/Audio_Sequence.C

@@ -49,6 +49,8 @@ Audio_Sequence::Audio_Sequence ( Track *track ) : Sequence( track )
 
 Audio_Sequence::~Audio_Sequence ( )
 {
+    track()->remove( this );
+
     log_destroy();
 }
 

Timeline/Control_Sequence.C

@@ -25,6 +25,7 @@ using namespace std;
 #include "Track.H"
 #include "Engine/Port.H"
 
+#include "Engine/Engine.H" // for lock()
 #include "Transport.H" // for transport->frame
 
 bool Control_Sequence::draw_with_gradient = true;
@@ -50,9 +51,19 @@ Control_Sequence::~Control_Sequence ( )
 {
     log_destroy();
 
+    engine->lock();
+
+    track()->remove( this );
+
+    engine->unlock();
+
     _output->shutdown();
 
     delete _output;
+
+    _output = NULL;
+
+    log_destroy();
 }
 
 void

Timeline/Sequence.C

@@ -75,10 +75,6 @@ Sequence::~Sequence (  )
     }
 
     _widgets.clear();
-
-    parent()->redraw();
-    parent()->remove( this );
-//    log_destroy();
 }
 
 nframes_t

Timeline/Track.C

@@ -354,13 +354,25 @@ Track::add ( Audio_Sequence * t )
 void
 Track::remove ( Audio_Sequence *t )
 {
+    timeline->wrlock();
+
     takes->remove( t );
 
+    timeline->unlock();
+
     resize();
 
 //            take_menu->remove( t->name() );
 }
 
+void
+Track::remove ( Annotation_Sequence *t )
+{
+    annotation->remove( t );
+
+    resize();
+}
+
 void
 Track::remove ( Control_Sequence *t )
 {
@@ -371,8 +383,6 @@ Track::remove ( Control_Sequence *t )
     engine->unlock();
 
     resize();
-
-    redraw();
 }
 
 void