move class pad_template and details initialization from _class_init to _base_init as done in the other plugins and recommended in the Gstreamer docs
move class pad_template and details initialization from _class_init to _base_init as done in the other plugins and recommended in the Gstreamer docs

tieto/farstream,ahmedammar/skype_farsight2,pexip/farstream,kakaroto/farstream,tieto/farstream,tieto/farstream,shadeslayer/farstream,kakaroto/farstream,ahmedammar/skype_farsight2,pexip/farstream,kakaroto/farstream,ahmedammar/skype_farsight2,pexip/farstream,tieto/farstream,shadeslayer/farstream,ahmedammar/skype_farsight2,shadeslayer/farstream,pexip/farstream,shadeslayer/farstream,kakaroto/farstream,tieto/farstream