[gnumeric] Fix array reading in plots using matrix data. [#765483]

[Jean Bréfort <jbrefort src gnome org>]

commit 807faaa5c807d77b0282afa2c91f863b7c5e5b32
Author: Jean Brefort <jean brefort normalesup org>
Date:   Sun Apr 24 08:56:32 2016 +0200

    Fix array reading in plots using matrix data. [#765483]

 ChangeLog   |    4 ++++
 NEWS        |    3 +++
 src/graph.c |    2 +-
 3 files changed, 8 insertions(+), 1 deletions(-)
---
diff --git a/ChangeLog b/ChangeLog
index 96aa3ac..a5370fa 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+2016-04-24  Jean Brefort  <jean brefort normalesup org>
+
+       * src/graph.c (gnm_go_data_matrix_load_values): fix array reading. [#765483]
+
 2016-04-17  Jean Brefort  <jean brefort normalesup org>
 
        * configure.ac: protect against pxlib weirdness.
diff --git a/NEWS b/NEWS
index 8ced0fe..b448636 100644
--- a/NEWS
+++ b/NEWS
@@ -1,5 +1,8 @@
 Gnumeric 1.12.29
 
+Jean:
+       * Fix array reading in plots using matrix data. [#765483]
+
 Morten:
        * Documentation fixes for complex numbers.
        * Fix rare RANDBETWEEN problem.
diff --git a/src/graph.c b/src/graph.c
index 448a64e..20436fd 100644
--- a/src/graph.c
+++ b/src/graph.c
@@ -1333,7 +1333,7 @@ gnm_go_data_matrix_load_values (GODataMatrix *dat)
                minimum = G_MAXDOUBLE;
                for (col = 0; col < size.columns; col ++)
                        for (row = 0; row < size.rows; row++) {
-                               v = mat->val->v_array.vals[row][col];
+                               v = mat->val->v_array.vals[col][row];
                                cur = col * size.rows + row;
                                if (VALUE_IS_EMPTY_OR_ERROR (v)) {
                                        vals[row * size.columns + col] = go_nan;