output-item: Collapse the inheritance hierarchy into a single struct.

[pspp] / src / output / charts / roc-chart-cairo.c

diff --git a/src/output/charts/roc-chart-cairo.c b/src/output/charts/roc-chart-cairo.c
index ae2db62efbd6f7acd4482be82323d70bc093e154..910d6152f0a7f64140b67cae932aa60a9bc7a652 100644 (file)
--- a/src/output/charts/roc-chart-cairo.c
+++ b/src/output/charts/roc-chart-cairo.c
@@ -27,10 +27,10 @@
 #define _(msgid) gettext (msgid)
 
 void
-xrchart_draw_roc (const struct chart_item *chart_item, cairo_t *cr,
+xrchart_draw_roc (const struct chart *chart, cairo_t *cr,
                   struct xrchart_geometry *geom)
 {
-  const struct roc_chart *rc = to_roc_chart (chart_item);
+  const struct roc_chart *rc = to_roc_chart (chart);
   size_t i;
 
   xrchart_write_title (cr, geom, _("ROC Curve"));