static void
-set_model_on_treeview (const PsppireImportAssistant *ia, GtkWidget *tree_view, size_t first_line)
+set_model_on_treeview (PsppireImportAssistant *ia, GtkWidget *tree_view, size_t first_line)
{
GtkTreeModel *model = GTK_TREE_MODEL (psppire_empty_list_store_new (ia->line_cnt - first_line));