[gnome-desktop] Ensure EDID is at least 128 bytes and a multiple of 128 bytes

[Richard Hughes <rhughes src gnome org>]

commit 80b400b717bc556fcd42f93b297410d3c4f56631
Author: Richard Hughes <richard hughsie com>
Date:   Tue Jul 30 10:37:50 2013 +0100

    Ensure EDID is at least 128 bytes and a multiple of 128 bytes
    
    Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=956772

 libgnome-desktop/gnome-rr.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/libgnome-desktop/gnome-rr.c b/libgnome-desktop/gnome-rr.c
index c59d142..da447d7 100644
--- a/libgnome-desktop/gnome-rr.c
+++ b/libgnome-desktop/gnome-rr.c
@@ -1475,7 +1475,7 @@ read_edid_data (GnomeRROutput *output, gsize *len)
 
     if (result)
     {
-       if (*len % 128 == 0)
+       if (*len > 0 && *len % 128 == 0)
            return result;
        else
            g_free (result);