[grilo] core: Fix API doc for album artist

[Bastien Nocera <hadess src gnome org>]

commit 15a844e4c3a6cbd616c776957d68afb8078ba4e3
Author: Bastien Nocera <hadess hadess net>
Date:   Mon Nov 7 16:27:39 2016 +0100

    core: Fix API doc for album artist
    
    Bug introduced in commit e9be911

 src/data/grl-media.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/src/data/grl-media.c b/src/data/grl-media.c
index ac9eeb6..270a3e9 100644
--- a/src/data/grl-media.c
+++ b/src/data/grl-media.c
@@ -1747,7 +1747,7 @@ grl_media_set_album (GrlMedia *media, const gchar *album)
 /**
  * grl_media_set_album_artist:
  * @media: the media instance
- * @album: the audio's album main artist
+ * @album_artist: the audio's album main artist
  *
  * Set the main artist of the album of the media
  *