[grilo-plugins] itunes-podcast: Fix source appearing in Videos

[Bastien Nocera <hadess src gnome org>]

commit d521fa562508ccb51c924f35be85003e68364992
Author: Bastien Nocera <hadess hadess net>
Date:   Wed Sep 14 22:04:13 2016 +0200

    itunes-podcast: Fix source appearing in Videos
    
    https://bugzilla.gnome.org/show_bug.cgi?id=771445

 src/lua-factory/sources/grl-itunes-podcast.lua |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/src/lua-factory/sources/grl-itunes-podcast.lua b/src/lua-factory/sources/grl-itunes-podcast.lua
index 4bac1ec..194e5cc 100644
--- a/src/lua-factory/sources/grl-itunes-podcast.lua
+++ b/src/lua-factory/sources/grl-itunes-podcast.lua
@@ -39,6 +39,7 @@ source = {
   supported_keys = { 'artist', 'thumbnail', 'id', 'title', 'region',
                      'external-url', 'genre', 'modification-date',
                      'mime-type', 'description' },
+  supported_media = 'audio',
   config_keys = {
     optional = { 'country' },
   },