[grilo] bindings: add Vala binding for GRL_METADATA_KEY_INVALID

[Juan A. Suarez Romero <jasuarez src gnome org>]

commit 8317937ec3032ea983d5699ec2ce7aa71375d259
Author: Simon Wenner <simon wenner ch>
Date:   Thu May 22 00:09:50 2014 +0200

    bindings: add Vala binding for GRL_METADATA_KEY_INVALID
    
    https://bugzilla.gnome.org/show_bug.cgi?id=730548

 bindings/vala/grilo-0.2-custom.vala |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/bindings/vala/grilo-0.2-custom.vala b/bindings/vala/grilo-0.2-custom.vala
index 67506a7..2b3f225 100644
--- a/bindings/vala/grilo-0.2-custom.vala
+++ b/bindings/vala/grilo-0.2-custom.vala
@@ -14,6 +14,8 @@ namespace Grl {
 
        [Compact]
        public class MetadataKey {
+               [CCode (cname ="GRL_METADATA_KEY_INVALID")]
+               public static Grl.KeyID INVALID;
                [CCode (cname ="GRL_METADATA_KEY_ALBUM")]
                public static Grl.KeyID ALBUM;
                [CCode (cname ="GRL_METADATA_KEY_ARTIST")]