[gnumeric] xlsx: fix export of bar/col direction.

[Morten Welinder <mortenw src gnome org>]

commit cba73834e09dde6de8146b88433f6e836d31fa22
Author: Morten Welinder <terra gnome org>
Date:   Fri Jan 16 21:23:03 2015 -0500

    xlsx: fix export of bar/col direction.

 NEWS                               |    2 +-
 plugins/excel/xlsx-write-drawing.c |    7 +++++--
 2 files changed, 6 insertions(+), 3 deletions(-)
---
diff --git a/NEWS b/NEWS
index 1cf81f6..8ccc339 100644
--- a/NEWS
+++ b/NEWS
@@ -26,7 +26,7 @@ Morten:
        * Fix sheet-filter problem with errors.  [#742601]
        * Improve error handling for .gnumeric a bit.
        * Improve xlsx graph import: line colour.
-       * Improve xlsx graph export: line style.
+       * Improve xlsx graph export: line style; bar/col direction.
 
 Thomas Kluyver:
        * Fix import of extended floats from wk4 files.  [#739679]
diff --git a/plugins/excel/xlsx-write-drawing.c b/plugins/excel/xlsx-write-drawing.c
index 5a5d71b..d95ece6 100644
--- a/plugins/excel/xlsx-write-drawing.c
+++ b/plugins/excel/xlsx-write-drawing.c
@@ -233,8 +233,11 @@ xlsx_write_one_plot (XLSXWriteState *state, GsfXMLOut *xml, GogObject const *cha
                        axis_type[1] = GOG_AXIS_X;
                }
                gsf_xml_out_start_element (xml, "c:barChart");
-               gsf_xml_out_simple_element (xml, "c:barDir",
-                       horizontal ? "bar" : "col");
+
+               gsf_xml_out_start_element (xml, "c:barDir");
+               gsf_xml_out_add_cstr_unchecked (xml, "val", horizontal ? "bar" : "col");
+               gsf_xml_out_end_element (xml);
+
                xlsx_write_plot_1_5_type (xml, plot, TRUE);
 
                gsf_xml_out_start_element (xml, "c:overlap");