[goffice] Don't use uninitialized values. [#696569]

[Jean Bréfort <jbrefort src gnome org>]

commit 92b77ba99041a40d2d54673f36b4e2dc15b675af
Author: Jean Brefort <jean brefort normalesup org>
Date:   Mon Mar 25 17:33:54 2013 +0100

    Don't use uninitialized values. [#696569]

 ChangeLog                        |    5 +++++
 plugins/plot_barcol/gog-barcol.c |    3 +++
 2 files changed, 8 insertions(+), 0 deletions(-)
---
diff --git a/ChangeLog b/ChangeLog
index 9a2bcd0..a064715 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2013-03-25  Jean Brefort  <jean brefort normalesup org>
+
+       * plugins/plot_barcol/gog-barcol.c (gog_barcol_view_render): don't use
+       uninitialized values. [#696569]
+
 2013-03-25  Morten Welinder  <terra gnome org>
 
        * goffice/canvas/goc-polyline.c (goc_polyline_draw): Fix cairo
diff --git a/plugins/plot_barcol/gog-barcol.c b/plugins/plot_barcol/gog-barcol.c
index 50bd165..e19a69e 100644
--- a/plugins/plot_barcol/gog-barcol.c
+++ b/plugins/plot_barcol/gog-barcol.c
@@ -618,6 +618,9 @@ gog_barcol_view_render (GogView *view, GogViewAllocation const *bbox)
                base_series = GOG_SERIES (series);
                if (!gog_series_is_valid (base_series)) {
                        lengths[i] = 0;
+                       errors[i] = NULL;
+                       lines[i] = NULL;
+                       labels[i] = NULL;
                        continue;
                }
                vals[i] = go_data_get_values (base_series->values[1].data);