rem: gtk_file_selection_get_filename (file_selector) );
add: file_selection_get_filename (file_selector) );
context: gboolean change_print_to_file ( GtkButton *button, gpointer data ){    GtkFileSelection * file_selector;    file_selector = g_object_get_data ( G_OBJECT(button), "entry" );    gtk_entry_set_text ( GTK_ENTRY(data),			 gtk_file_selection_get_filename (file_selector) );    return FALSE;}