[gnumeric] xlsx: don't write multiple identical styles.

[Morten Welinder <mortenw src gnome org>]

commit 0499709733f730a420f878c79fef355f86f568a5
Author: Morten Welinder <terra gnome org>
Date:   Sat May 31 20:33:01 2014 -0400

    xlsx: don't write multiple identical styles.

 plugins/excel/ChangeLog    |    2 ++
 plugins/excel/xlsx-write.c |    2 +-
 2 files changed, 3 insertions(+), 1 deletions(-)
---
diff --git a/plugins/excel/ChangeLog b/plugins/excel/ChangeLog
index b0aaa78..09db90f 100644
--- a/plugins/excel/ChangeLog
+++ b/plugins/excel/ChangeLog
@@ -2,6 +2,8 @@
 
        * xlsx-write.c (xlsx_write_cells): Support value formats.  Fixes
        #724517.
+       (xlsx_write_workbook): Make styles hash use proper hash and
+       equality functions.
 
 2014-05-23  Morten Welinder <terra gnome org>
 
diff --git a/plugins/excel/xlsx-write.c b/plugins/excel/xlsx-write.c
index 1406432..6849b48 100644
--- a/plugins/excel/xlsx-write.c
+++ b/plugins/excel/xlsx-write.c
@@ -2799,7 +2799,7 @@ xlsx_write_workbook (XLSXWriteState *state, GsfOutfile *root_part)
        state->shared_string_hash = g_hash_table_new (g_direct_hash, g_direct_equal);
        state->shared_string_array = g_ptr_array_new ();
        state->styles_hash = g_hash_table_new_full
-               (g_direct_hash, g_direct_equal,
+               (gnm_style_hash, (GEqualFunc)gnm_style_equal,
                 (GDestroyNotify)gnm_style_unref, NULL);
        state->styles_array = g_ptr_array_new ();
        state->dxfs_hash = g_hash_table_new (g_direct_hash, g_direct_equal);