[tracker] tracker-extract: Plug leaks in GStreamer extractor

[Carlos Garnacho <carlosg src gnome org>]

commit a78dfed746196106d2a3d877a79be828bf8c7e7d
Author: Carlos Garnacho <carlosg gnome org>
Date:   Sun Nov 27 19:55:21 2016 +0100

    tracker-extract: Plug leaks in GStreamer extractor
    
    Some generated URIs being leaked.

 src/tracker-extract/tracker-extract-gstreamer.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/src/tracker-extract/tracker-extract-gstreamer.c b/src/tracker-extract/tracker-extract-gstreamer.c
index 081b89f..9753377 100644
--- a/src/tracker-extract/tracker-extract-gstreamer.c
+++ b/src/tracker-extract/tracker-extract-gstreamer.c
@@ -171,10 +171,12 @@ intern_artist (MetadataExtractor     *extractor,
        node = g_slist_find_custom (extractor->artist_list, artist_uri,
                                    (GCompareFunc) tracker_resource_identifier_compare_func);
        if (node) {
+               g_free (artist_uri);
                return node->data;
        }
 
        artist = tracker_extract_new_artist (artist_name);
+       g_free (artist_uri);
 
        extractor->artist_list = g_slist_prepend (extractor->artist_list, artist);