// if(mwindow->edl->local_session->preview_end <= 0 ||
// mwindow->edl->local_session->preview_end > new_length)
// mwindow->edl->local_session->preview_end = new_length;
// if(mwindow->edl->local_session->preview_end <= 0 ||
// mwindow->edl->local_session->preview_end > new_length)
// mwindow->edl->local_session->preview_end = new_length;