[gnumeric] Fuzzed file fixes. [#751060]

[Andreas J. Guelzow <guelzow src gnome org>]

commit 99be5544265aa56d129fce500054e3a781502660
Author: Andreas J. Guelzow <aguelzow pyrshep ca>
Date:   Wed Jun 17 00:04:32 2015 -0600

    Fuzzed file fixes.  [#751060]
    
    2015-06-16  Andreas J. Guelzow <aguelzow pyrshep ca>
    
        * openoffice-read.c (od_series_reg_equation): check whether
        regression in fact exists.

 NEWS                                 |    1 +
 plugins/openoffice/ChangeLog         |    5 +++++
 plugins/openoffice/openoffice-read.c |    2 ++
 3 files changed, 8 insertions(+), 0 deletions(-)
---
diff --git a/NEWS b/NEWS
index f7ca288..2af7e29 100644
--- a/NEWS
+++ b/NEWS
@@ -6,6 +6,7 @@ Andreas:
        * Improve function import to ODF. [#750627]
        * Add CONFIDENCE.T, MODE.MULT, PERCENTILE.EXC, PERCENTRANK.EXC
        and QUARTILE.EXC.
+       * Fuzzed file fixes.  [#751060]
 
 Jean:
        * Fix xlsx import of plot area manual layout. [#748016]
diff --git a/plugins/openoffice/ChangeLog b/plugins/openoffice/ChangeLog
index b4a4698..2ed33b5 100644
--- a/plugins/openoffice/ChangeLog
+++ b/plugins/openoffice/ChangeLog
@@ -1,5 +1,10 @@
 2015-06-16  Andreas J. Guelzow <aguelzow pyrshep ca>
 
+       * openoffice-read.c (od_series_reg_equation): check whether
+       regression in fact exists.
+
+2015-06-16  Andreas J. Guelzow <aguelzow pyrshep ca>
+
        * openoffice-read.c (oo_func_map_in): Add MODE.MULT
        * openoffice-write.c (odf_expr_func_handler): Export MODE.MULT
        with Microsoft prefix
diff --git a/plugins/openoffice/openoffice-read.c b/plugins/openoffice/openoffice-read.c
index 6d47625..7a1d99e 100644
--- a/plugins/openoffice/openoffice-read.c
+++ b/plugins/openoffice/openoffice-read.c
@@ -9504,6 +9504,8 @@ od_series_reg_equation (GsfXMLIn *xin, xmlChar const **attrs)
        gboolean display_r_square = TRUE;
        GSList *prop_list = NULL;
 
+       g_return_if_fail (state->chart.regression != NULL);
+
        odf_gog_check_position (xin, attrs, &prop_list);
 
        for (; attrs != NULL && attrs[0] && attrs[1] ; attrs += 2)