I am trying to implement a simple list with a single item selected initially. I
use the following code to set the initial selection, but it does not work. The
first item in the list is always selected.

    gtk_tree_selection_set_mode( select, GTK_SELECTION_SINGLE);
    if ( def>=0 ) {
	GtkTreePath *path = gtk_tree_path_new_from_indices(def,-1);
	gtk_tree_selection_select_path(select,path);
	gtk_tree_path_free(path);
    }