demux: mkv: delete all tags

Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

modules/demux/mkv/matroska_segment.cpp

@@ -94,6 +94,7 @@ matroska_segment_c::~matroska_segment_c()
     vlc_delete_all( stored_editions );
     vlc_delete_all( translations );
     vlc_delete_all( families );
+    vlc_delete_all( tags );
 }