pad: Fix docs/annotation of gst_pad_probe_info_get_buffer_list()
pad: Fix docs/annotation of gst_pad_probe_info_get_buffer_list()

It's not get_bufferlist(). Because of that it was ignored by the docs and
G-I, leading to crashes because of broken ownership transfer.

https://bugzilla.gnome.org/show_bug.cgi?id=756898

centricular/gstreamer,StreamUtils/gstreamer,centricular/gstreamer,jpxiong/gstreamer,centricular/gstreamer,StreamUtils/gstreamer,jpxiong/gstreamer,jpxiong/gstreamer,StreamUtils/gstreamer,StreamUtils/gstreamer,centricular/gstreamer,jpxiong/gstreamer,StreamUtils/gstreamer,jpxiong/gstreamer,centricular/gstreamer