Original commit message from CVS:
* gst/law/alaw-decode.c: (alawdec_getcaps):
* gst/law/alaw-encode.c: (alawenc_getcaps), (gst_alawenc_chain):
* gst/law/mulaw-decode.c: (mulawdec_getcaps):
* gst/law/mulaw-encode.c: (mulawenc_getcaps):
Fix negotiation to deal with ANY/EMPTY caps instead of leaking.