Otherwise it will have a 0 value and GstTagList won't be found
for GstValue functions (serialization/deserialization)
https://bugzilla.gnome.org/show_bug.cgi?id=733131
_priv_gst_sample_initialize ();
_priv_gst_context_initialize ();
_priv_gst_date_time_initialize ();
+ _priv_gst_tag_initialize ();
_priv_gst_toc_initialize ();
_priv_gst_value_initialize ();
g_type_class_ref (gst_param_spec_fraction_get_type ());
- _priv_gst_tag_initialize ();
gst_parse_context_get_type ();
_priv_gst_plugin_initialize ();