Merges the two given lists into a new list. If one of the lists is NULL, a copy of the other is returned. If both lists are NULL, NULL is returned. Free-function: gst_tag_list_unref
second list to merge
the mode to use
the new list. [transfer full]
See Implementation
Merges the two given lists into a new list. If one of the lists is NULL, a copy of the other is returned. If both lists are NULL, NULL is returned. Free-function: gst_tag_list_unref