[tracker-miners] tracker-extract-mp3: Ensure values are initialized

[Carlos Garnacho <carlosg src gnome org>]

commit 60df3c0e7f153596eb7fad23e5e81b3aaf015d03
Author: Carlos Garnacho <carlosg gnome org>
Date:   Mon Aug 26 10:48:40 2019 +0200

    tracker-extract-mp3: Ensure values are initialized

 src/tracker-extract/tracker-extract-mp3.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/src/tracker-extract/tracker-extract-mp3.c b/src/tracker-extract/tracker-extract-mp3.c
index e19b9af07..b36f53899 100644
--- a/src/tracker-extract/tracker-extract-mp3.c
+++ b/src/tracker-extract/tracker-extract-mp3.c
@@ -1362,8 +1362,8 @@ id3_get_ufid_type (const gchar *name)
 static void
 extract_txxx_tags (id3v2tag *tag, const gchar *data, guint pos, size_t csize, id3tag *info, gfloat version)
 {
-       gchar *description;
-       gchar *value;
+       gchar *description = NULL;
+       gchar *value = NULL;
        gchar text_encode;
        const gchar *text_desc;
        const gchar *text;