[goffice] A better fix.

[Jean Bréfort <jbrefort src gnome org>]

commit 9626ecd1863c8d6b5c3d6f6ae2bc23112cad1c2b
Author: Jean Brefort <jean brefort normalesup org>
Date:   Wed May 12 08:59:03 2021 +0200

    A better fix.

 plugins/plot_surface/gog-matrix.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/plugins/plot_surface/gog-matrix.c b/plugins/plot_surface/gog-matrix.c
index da033baee..956e7a22b 100644
--- a/plugins/plot_surface/gog-matrix.c
+++ b/plugins/plot_surface/gog-matrix.c
@@ -141,7 +141,7 @@ gog_matrix_view_render (GogView *view, GogViewAllocation const *bbox)
        if (plot->plotted_data)
                data = plot->plotted_data;
        else
-               data = GOG_XYZ_PLOT (plot)->plotted_data = GOG_XYZ_PLOT_GET_CLASS (plot)->build_matrix 
(GOG_XYZ_PLOT (plot), NULL);
+               data = GOG_XYZ_PLOT (plot)->plotted_data = gog_xyz_plot_build_matrix (GOG_XYZ_PLOT (plot), 
NULL);
 
        x_map = gog_axis_map_new (plot->base.axis[0],
                                  view->residual.x , view->residual.w);