[goffice] Hide 3D series imported from Excel in legend. [#788831]

[Jean Bréfort <jbrefort src gnome org>]

commit 70f215a9de0a2b5bdef26bb258b75e5bd7df7855
Author: Jean Brefort <jean brefort normalesup org>
Date:   Mon Oct 23 11:19:28 2017 +0200

    Hide 3D series imported from Excel in legend. [#788831]

 ChangeLog                         |    5 +++++
 NEWS                              |    2 ++
 plugins/plot_surface/xl-surface.c |    7 ++++++-
 3 files changed, 13 insertions(+), 1 deletions(-)
---
diff --git a/ChangeLog b/ChangeLog
index deffcf4..0fdf402 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2017-10-23  Jean Brefort  <jean brefort normalesup org>
+
+       * plugins/plot_surface/xl-surface.c (xl_xyz_series_init): don't show these
+       series in the legend. [#788861]
+
 2017-10-02  Jean Brefort  <jean brefort normalesup org>
 
        * plugins/plot_surface/gog-xyz-surface.c
diff --git a/NEWS b/NEWS
index f332655..ca53f98 100644
--- a/NEWS
+++ b/NEWS
@@ -3,6 +3,8 @@ goffice 0.10.36:
 Jean:
        * Fix engineering format. [#785669]
        * Fix crash in 3D plots when X or Y values are missing. [#788437]
+       * Don't use invalid styles in legned from contour or surface plots imported
+       from Excel. [#788861]
 
 --------------------------------------------------------------------------
 goffice 0.10.35:
diff --git a/plugins/plot_surface/xl-surface.c b/plugins/plot_surface/xl-surface.c
index 5808886..bf7745e 100644
--- a/plugins/plot_surface/xl-surface.c
+++ b/plugins/plot_surface/xl-surface.c
@@ -79,9 +79,14 @@ xl_xyz_series_class_init (GogStyledObjectClass *gso_klass)
        obj_klass->update = xl_xyz_series_update;
 }
 
+static void
+xl_xyz_series_init (GogSeries *series)
+{
+       series->has_legend = FALSE;
+}
 
 GSF_DYNAMIC_CLASS (XLXYZSeries, xl_xyz_series,
-       xl_xyz_series_class_init, NULL,
+       xl_xyz_series_class_init, xl_xyz_series_init,
        GOG_TYPE_SERIES)
 
 /*****************************************************************************/