struct chart *
spreadlevel_plot_create (const char *label, double tx_pwr)
{
- struct spreadlevel_plot_chart *sl = xzalloc (sizeof *sl);
+ struct spreadlevel_plot_chart *sl = XZALLOC (struct spreadlevel_plot_chart);
chart_init (&sl->chart, &spreadlevel_plot_chart_class, label);
sl->x_lower = DBL_MAX;