[gnome-games] grilo: Fix errors when without internet access

[Adrien Plazas <aplazas src gnome org>]

commit 56aa89c6524fdb1829a1c05bdfc901ae5e2384f3
Author: Bastien Nocera <hadess hadess net>
Date:   Sat Aug 13 14:03:16 2016 +0200

    grilo: Fix errors when without internet access
    
    It's not an error for the GamesDB source not to be available, it
    is what happens when Internet access is not available.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=769825

 src/grilo/grilo-media.vala |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/src/grilo/grilo-media.vala b/src/grilo/grilo-media.vala
index 77c0a92..3c3949c 100644
--- a/src/grilo/grilo-media.vala
+++ b/src/grilo/grilo-media.vala
@@ -48,8 +48,8 @@ public class Games.GriloMedia : Object {
 
                var registry = get_registry ();
                var source = registry.lookup_source ("grl-thegamesdb");
-
-               return_val_if_fail (source != null, null);
+               if (source == null)
+                       return;
 
                var base_media = new Grl.Media ();
                var title_string = title.get_title ();