rem: if ( DEBUG ) printf ( "gsb_transactions_list_sort_column_changed\n" );
add: devel_debug ( "gsb_transactions_list_sort_column_changed" );
context: gboolean gsb_transactions_list_sort_column_changed ( GtkTreeViewColumn *tree_view_column ){    GtkSortType sort_type;    gint sort_column_id;    if ( DEBUG )	printf ( "gsb_transactions_list_sort_column_changed\n" );    /* the third click give no sort for the column     * we forbid that here, so now, there is always a column which sort the tree view */    gtk_tree_sortable_get_sort_column_id ( GTK_TREE_SORTABLE ( gsb_transactions_list_get_sortable()),					   &sort_column_id,					   &sort_type );    if ( sort_column_id == -1 )    {	gtk_tree_sortable_set_sort_column_id ( GTK_TREE_SORTABLE (gsb_transactions_list_get_sortable()),					       gtk_tree_view_column_get_sort_column_id ( tree_view_column ),					       sort_type );	return FALSE;    }    gsb_transactions_list_set_background_color ( gsb_data_account_get_current_account ());    gsb_transactions_list_set_transactions_balances ( gsb_data_account_get_current_account ());    modification_fichier ( TRUE );    return FALSE;}