p->percent_spin = gtk_spin_button_new_with_range (0, 100, 10);
hbox_percent = psppire_scanf_new (_("Only the first %3d %% of file (approximately)"), &p->percent_spin);
p->percent_spin = gtk_spin_button_new_with_range (0, 100, 10);
hbox_percent = psppire_scanf_new (_("Only the first %3d %% of file (approximately)"), &p->percent_spin);