[tracker-miners] tracker-extract-mp3: Use tracker_resource_set_take_relation()

[Carlos Garnacho <carlosg src gnome org>]

commit 9a584e94635f0eabee1cf7ed9804227a7ab6e82f
Author: Carlos Garnacho <carlosg gnome org>
Date:   Mon Aug 26 10:41:49 2019 +0200

    tracker-extract-mp3: Use tracker_resource_set_take_relation()
    
    Avoids having to do some unrefs afterwards. Those were also triggering
    warnings as they might end up NULL.

 src/tracker-extract/tracker-extract-mp3.c | 9 +++------
 1 file changed, 3 insertions(+), 6 deletions(-)
---
diff --git a/src/tracker-extract/tracker-extract-mp3.c b/src/tracker-extract/tracker-extract-mp3.c
index 4e1270376..e19b9af07 100644
--- a/src/tracker-extract/tracker-extract-mp3.c
+++ b/src/tracker-extract/tracker-extract-mp3.c
@@ -2728,30 +2728,27 @@ tracker_extract_get_metadata (TrackerExtractInfo *info)
                md.album = tracker_resource_get_first_relation (album_disc, "nmm:albumDiscAlbum");
 
                tracker_resource_set_relation (main_resource, "nmm:musicAlbum", md.album);
-               tracker_resource_set_relation (main_resource, "nmm:musicAlbumDisc", album_disc);
+               tracker_resource_set_take_relation (main_resource, "nmm:musicAlbumDisc", album_disc);
 
                if (md.mb_release_id) {
                        mb_release_id = 
tracker_extract_new_external_reference("https://musicbrainz.org/doc/Release";,
                                                                               md.mb_release_id);
 
-                       tracker_resource_set_relation (md.album, "tracker:hasExternalReference", 
mb_release_id);
+                       tracker_resource_set_take_relation (md.album, "tracker:hasExternalReference", 
mb_release_id);
                }
 
                if (md.mb_release_group_id) {
                        mb_release_group_id = 
tracker_extract_new_external_reference("https://musicbrainz.org/doc/Release_Group";,
                                                                                     md.mb_release_group_id);
 
-                       tracker_resource_set_relation (md.album, "tracker:hasExternalReference", 
mb_release_group_id);
+                       tracker_resource_set_take_relation (md.album, "tracker:hasExternalReference", 
mb_release_group_id);
                }
 
                if (md.track_count > 0) {
                        tracker_resource_set_int (md.album, "nmm:albumTrackCount", md.track_count);
                }
 
-               g_object_unref (album_disc);
                g_clear_object (&album_artist);
-               g_object_unref (mb_release_id);
-               g_object_unref (mb_release_group_id);
        }
 
        tracker_resource_add_uri (main_resource, "rdf:type", "nmm:MusicPiece");