[libmediaart/api-cleanup: 12/16] extract: Add GError for _NO_TITLE, which is required in some cases

[Martyn James Russell <mr src gnome org>]

commit adaa018c98736d854b5146838e4af3a578bfe8ba
Author: Martyn Russell <martyn lanedo com>
Date:   Tue Feb 25 15:33:26 2014 +0000

    extract: Add GError for _NO_TITLE, which is required in some cases

 libmediaart/extract.c |    5 ++++-
 libmediaart/extract.h |    7 +++----
 2 files changed, 7 insertions(+), 5 deletions(-)
---
diff --git a/libmediaart/extract.c b/libmediaart/extract.c
index 9ddc8d0..ef04df8 100644
--- a/libmediaart/extract.c
+++ b/libmediaart/extract.c
@@ -666,7 +666,10 @@ get_heuristic (MediaArtType   type,
        gboolean retval = FALSE;
 
        if (title == NULL || title[0] == '\0') {
-               g_debug ("Unable to fetch media art, no title specified");
+               g_set_error (error,
+                            MEDIA_ART_ERROR,
+                            MEDIA_ART_ERROR_NO_TITLE,
+                            "Title is required, but was not provided, or was empty");
                return FALSE;
        }
 
diff --git a/libmediaart/extract.h b/libmediaart/extract.h
index 95ca6e7..68dd308 100644
--- a/libmediaart/extract.h
+++ b/libmediaart/extract.h
@@ -49,10 +49,9 @@ typedef enum {
 
 /**
  * MediaArtError:
- * @MEDIA_ART_ERROR_NOENT: The resource that the was passed (for example a
- * file or URI) does not exist.
  * @MEDIA_ART_ERROR_NO_STORAGE: Storage information is unknown, we
  * have no knowledge about removable media.
+ * @MEDIA_ART_ERROR_NO_TITLE: Title is required, but was not provided, or was empty.
  *
  * Enumeration values used in errors returned by the
  * #MediaArtError API.
@@ -60,8 +59,8 @@ typedef enum {
  * Since: 0.2
  **/
 typedef enum {
-       MEDIA_ART_ERROR_NOENT,
-       MEDIA_ART_ERROR_NO_STORAGE
+       MEDIA_ART_ERROR_NO_STORAGE,
+       MEDIA_ART_ERROR_NO_TITLE
 } MediaArtError;
 
 #define MEDIA_ART_ERROR media_art_error_quark ()