[goffice] Simplify third axis selection

[Jean Bréfort <jbrefort src gnome org>]

commit 43b6d03af8ee8423a86a490d7692f5c1d923f0ee
Author: Jean Brefort <jean brefort normalesup org>
Date:   Sun Jun 9 17:34:24 2013 +0200

    Simplify third axis selection

 plugins/plot_surface/gog-xyz-surface.c |    5 +----
 1 files changed, 1 insertions(+), 4 deletions(-)
---
diff --git a/plugins/plot_surface/gog-xyz-surface.c b/plugins/plot_surface/gog-xyz-surface.c
index 5f42943..5600856 100644
--- a/plugins/plot_surface/gog-xyz-surface.c
+++ b/plugins/plot_surface/gog-xyz-surface.c
@@ -560,10 +560,7 @@ gog_xyz_surface_plot_update (GogObject *obj)
                g_free (model->plotted_data);
        model->plotted_data = gog_xyz_plot_build_matrix (model, NULL);
        if (model->plotted_data) {
-               gog_axis_bound_changed (model->base.axis[GOG_IS_CONTOUR_PLOT (model)?
-                                                        GOG_AXIS_PSEUDO_3D:
-                                                            (GOG_IS_MATRIX_PLOT (model)?
-                                                                 GOG_AXIS_COLOR: GOG_AXIS_Z)],
+               gog_axis_bound_changed (model->base.axis[GOG_XYZ_PLOT_GET_CLASS (model)->third_axis],
                                            GOG_OBJECT (model));
        }