- xrchart_write_yscale (cr, geom, 0, gsl_histogram_max_val (h->gsl_hist));
- xrchart_write_xscale (cr, geom, gsl_histogram_min (h->gsl_hist),
- gsl_histogram_max (h->gsl_hist));
+ if (! xrchart_write_yscale (cr, geom, 0, gsl_histogram_max_val (h->gsl_hist)))
+ return;
+ if (! xrchart_write_xscale (cr, geom, gsl_histogram_min (h->gsl_hist),
+ gsl_histogram_max (h->gsl_hist)))
+ return;