X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=src%2Foutput%2Fcharts%2Fplot-hist-cairo.c;h=f8663428096ff06e434d24f3d0976b880cdf57b0;hb=ab90a86a87d3f006fbb362907b1c41110a117a79;hp=000695f331abdcded8c3e7097048b4305d6c6479;hpb=96994a54e60e9c95b8bba54c2281acf7059b1203;p=pspp

diff --git a/src/output/charts/plot-hist-cairo.c b/src/output/charts/plot-hist-cairo.c
index 000695f331..f866342809 100644
--- a/src/output/charts/plot-hist-cairo.c
+++ b/src/output/charts/plot-hist-cairo.c
@@ -100,17 +100,17 @@ hist_draw_bar (cairo_t *cr, const struct xrchart_geometry *geom,
 }
 
 void
-xrchart_draw_histogram (const struct chart_item *chart_item, cairo_t *cr,
+xrchart_draw_histogram (const struct chart *chart, cairo_t *cr,
                         struct xrchart_geometry *geom)
 {
-  struct histogram_chart *h = to_histogram_chart (chart_item);
+  struct histogram_chart *h = to_histogram_chart (chart);
   int i;
   int bins;
 
   xrchart_write_title (cr, geom, _("HISTOGRAM"));
 
   xrchart_write_ylabel (cr, geom, _("Frequency"));
-  xrchart_write_xlabel (cr, geom, chart_item_get_title (chart_item));
+  xrchart_write_xlabel (cr, geom, chart_get_title (chart));
 
   if (h->gsl_hist == NULL)
     {
@@ -118,9 +118,11 @@ xrchart_draw_histogram (const struct chart_item *chart_item, cairo_t *cr,
       return;
     }
 
-  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;
 
 
   /* Draw the ticks and compute if the rendered tick text is wider than the bin */