[goffice] Compilation: don't check g_free calls.

[Morten Welinder <mortenw src gnome org>]

commit 63915d9ed957e14adf7df121843dad4f03c0489e
Author: Morten Welinder <terra gnome org>
Date:   Mon Dec 15 11:49:36 2014 -0500

    Compilation: don't check g_free calls.

 plugins/plot_surface/gog-xyz-surface.c |    3 +--
 1 files changed, 1 insertions(+), 2 deletions(-)
---
diff --git a/plugins/plot_surface/gog-xyz-surface.c b/plugins/plot_surface/gog-xyz-surface.c
index 7f20d42..7f0b689 100644
--- a/plugins/plot_surface/gog-xyz-surface.c
+++ b/plugins/plot_surface/gog-xyz-surface.c
@@ -570,8 +570,7 @@ gog_xyz_surface_plot_update (GogObject *obj)
 
        if (GOG_PLOT (model)->desc.series.num_dim > 2 && model->z.fmt == NULL)
                        model->z.fmt = go_data_preferred_fmt (series->base.values[2].data);
-       if (model->plotted_data != NULL)
-               g_free (model->plotted_data);
+       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_XYZ_PLOT_GET_CLASS (model)->third_axis],