[tracker-miners/wip/jfelder/external-reference-fixes: 1/4] tracker-extract-mp3: Fix mb_release_group_id relation

[Jean Felder <jfelder src gnome org>]

commit 3dc04f6fca4398bdf089f1e169733b024ffe728e
Author: Jean Felder <jfelder src gnome org>
Date:   Sun Sep 1 15:51:17 2019 +0200

    tracker-extract-mp3: Fix mb_release_group_id relation
    
    This was a regression introduced by commit
    695896b5f7f3df35edc67f5a95c7a4c9ece1137f
    
    An album can have up to 2 externalReference. One associated with a
    release id an other one associated a release group id.

 src/tracker-extract/tracker-extract-mp3.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/src/tracker-extract/tracker-extract-mp3.c b/src/tracker-extract/tracker-extract-mp3.c
index 736e3eabf..b52437730 100644
--- a/src/tracker-extract/tracker-extract-mp3.c
+++ b/src/tracker-extract/tracker-extract-mp3.c
@@ -2740,7 +2740,7 @@ tracker_extract_get_metadata (TrackerExtractInfo *info)
                        mb_release_group_id = 
tracker_extract_new_external_reference("https://musicbrainz.org/doc/Release_Group";,
                                                                                     md.mb_release_group_id);
 
-                       tracker_resource_set_take_relation (md.album, "tracker:hasExternalReference", 
mb_release_group_id);
+                       tracker_resource_add_take_relation (md.album, "tracker:hasExternalReference", 
mb_release_group_id);
                }
 
                if (md.track_count > 0) {