[gnome-documents] pdf: add a reference to a libgdata bug

[Cosimo Cecchi <cosimoc src gnome org>]

commit a046904ee0eae2f9033c9b00613a33f0b3d7cb61
Author: Cosimo Cecchi <cosimoc gnome org>
Date:   Mon Aug 22 19:47:51 2011 -0400

    pdf: add a reference to a libgdata bug

 src/lib/gd-pdf-loader.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)
---
diff --git a/src/lib/gd-pdf-loader.c b/src/lib/gd-pdf-loader.c
index 42e4918..5847512 100644
--- a/src/lib/gd-pdf-loader.c
+++ b/src/lib/gd-pdf-loader.c
@@ -326,7 +326,8 @@ pdf_load_job_from_google_documents_with_object (PdfLoadJob *job,
    * but I can't seem to use a more generic class, or GData segfaults.
    * OTOH, using this type always works, even for presentations/spreadsheets.
    *
-   * To be investigated...
+   * This needs to be fixed in libgdata, see
+   * https://bugzilla.gnome.org/show_bug.cgi?id=656971
    */
   gdata_service_query_single_entry_async (GDATA_SERVICE (service),
                                           gdata_documents_service_get_primary_authorization_domain (),