gst/law/: Ported alaw and mulaw plugins to 0.9, fixed the negotiation as well.

gst/law/: Ported alaw and mulaw plugins to 0.9, fixed the negotiation as well.

Original commit message from CVS:
* gst/law/alaw-decode.c: (alawdec_getcaps), (alawdec_setcaps),
(gst_alawdec_init), (gst_alawdec_chain):
* gst/law/alaw-encode.c: (alawenc_getcaps), (alawenc_setcaps),
(gst_alawenc_init), (gst_alawenc_chain):
* gst/law/mulaw-decode.c: (mulawdec_getcaps), (mulawdec_setcaps),
(gst_mulawdec_init), (gst_mulawdec_chain):
* gst/law/mulaw-encode.c: (mulawenc_getcaps), (mulawenc_setcaps),
(gst_mulawenc_init), (gst_mulawenc_chain):
Ported alaw and mulaw plugins to 0.9, fixed the negotiation as
well.