[gnumeric] xlsx: add noFill for graph lines even when lines are zero width.

[Morten Welinder <mortenw src gnome org>]

commit 2eeffa809c740a029ec797cc54d464318fb82d18
Author: Morten Welinder <terra gnome org>
Date:   Mon Mar 16 10:37:34 2015 -0400

    xlsx: add noFill for graph lines even when lines are zero width.

 plugins/excel/ChangeLog            |    5 +++++
 plugins/excel/xlsx-write-drawing.c |    1 +
 2 files changed, 6 insertions(+), 0 deletions(-)
---
diff --git a/plugins/excel/ChangeLog b/plugins/excel/ChangeLog
index 92a8edb..a7906dc 100644
--- a/plugins/excel/ChangeLog
+++ b/plugins/excel/ChangeLog
@@ -1,3 +1,8 @@
+2015-03-16  Morten Welinder  <terra gnome org>
+
+       * xlsx-write-drawing.c (xlsx_write_go_style_full): Ensure that XL
+       doesn't see lines where none are wanted.
+
 2015-03-13  Morten Welinder  <terra gnome org>
 
        * xlsx-read-drawing.c (xlsx_drawing_twoCellAnchor_end): Only set
diff --git a/plugins/excel/xlsx-write-drawing.c b/plugins/excel/xlsx-write-drawing.c
index 89d8382..708b628 100644
--- a/plugins/excel/xlsx-write-drawing.c
+++ b/plugins/excel/xlsx-write-drawing.c
@@ -468,6 +468,7 @@ xlsx_write_go_style_full (GsfXMLOut *xml, GOStyle *style, const XLSXStyleContext
                if (is_none) {
                        /* Special meaning of zero width  */
                        gsf_xml_out_add_int (xml, "w", 0);
+                       gsf_xml_out_simple_element (xml, "a:noFill", NULL);
                } else if (!style->line.auto_width && style->line.width > 0)
                        gsf_xml_out_add_int (xml, "w", style->line.width * 12700);