[grilo] core: Fix API doc for composer

[Bastien Nocera <hadess src gnome org>]

commit 40bc6960318281cd21f379d2b3ba4da0ab33d0a7
Author: Bastien Nocera <hadess hadess net>
Date:   Mon Nov 7 16:28:19 2016 +0100

    core: Fix API doc for composer
    
    Bug introduced in commit e61f217

 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 270a3e9..b298b95 100644
--- a/src/data/grl-media.c
+++ b/src/data/grl-media.c
@@ -1799,7 +1799,7 @@ grl_media_set_artist (GrlMedia *media, const gchar *artist)
 /**
  * grl_media_set_composer:
  * @media: the media instance
- * @artist: the audio's composer
+ * @composer: the audio's composer
  *
  * Set the composer of the media
  *