[gnumeric] Ensure that the pixbuf stores the image type.

[Jean Bréfort <jbrefort src gnome org>]

commit 7dd91e30e636c4130e8b2bb1936d110b05b8b40a
Author: Jean Brefort <jean brefort normalesup org>
Date:   Sat Feb 28 20:18:32 2015 +0100

    Ensure that the pixbuf stores the image type.

 ChangeLog                |    5 +++++
 src/sheet-object-image.c |    6 +++++-
 2 files changed, 10 insertions(+), 1 deletions(-)
---
diff --git a/ChangeLog b/ChangeLog
index 8678ad2..ce250b0 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2015-02-28  Jean Brefort  <jean brefort normalesup org>
+
+       * src/sheet-object-image.c (gnm_soi_assign_to_sheet): ensure that the
+       pixbuf stores the image type.
+
 2015-02-28  Morten Welinder  <terra gnome org>
 
        * src/sheet-object-image.c (SheetObjectImage): Just keep the
diff --git a/src/sheet-object-image.c b/src/sheet-object-image.c
index dae13c7..12f0b13 100644
--- a/src/sheet-object-image.c
+++ b/src/sheet-object-image.c
@@ -507,8 +507,12 @@ gnm_soi_assign_to_sheet (SheetObject *so, Sheet *sheet)
        } else if (soi->name) {
                GODoc *doc = GO_DOC (sheet->workbook);
                GType type = go_image_type_for_format (soi->type);
-               if (type != 0)
+               if (type != 0) {
                        soi->image = g_object_ref (go_doc_image_fetch (doc, soi->name, type));
+                       if (GO_IS_PIXBUF (soi->image))
+                               /* we need to ensure that the pixbuf type is set because it used to be 
missed, see #745297 */
+                               g_object_set (soi->image, "image-type", soi->type, NULL);
+               }
        } else {
                /* There is nothing we can do */
        }