Oops. Fix order of reference in track destructor.

Timeline/Track.C

@@ -88,6 +88,8 @@ Track::~Track ( )
     control = NULL;
     annotation = NULL;
 
+    solo( false );
+
     Fl_Group::clear();
 
     log_destroy();
@@ -100,8 +102,6 @@ Track::~Track ( )
 
     _sequence = NULL;
 
-    solo( false );
-
     if ( _name )
         free( _name );