ext/: \1/Codec, (fixes #142193)

ext/: \1/Codec, (fixes #142193)

Original commit message from CVS:
reviewed by Benjamin Otte  <otte@gnome.org>
* ext/a52dec/gsta52dec.c:
* ext/divx/gstdivxdec.c:
* ext/divx/gstdivxenc.c:
* ext/dts/gstdtsdec.c: (gst_dtsdec_base_init):
* ext/faac/gstfaac.c: (gst_faac_base_init):
* ext/faad/gstfaad.c: (gst_faad_base_init):
* ext/ivorbis/vorbisfile.c:
* ext/lame/gstlame.c:
* ext/libfame/gstlibfame.c:
* ext/mpeg2enc/gstmpeg2enc.cc:
* ext/musicbrainz/gsttrm.c: (gst_musicbrainz_base_init):
* ext/sidplay/gstsiddec.cc:
* ext/speex/gstspeexdec.c:
* ext/speex/gstspeexenc.c:
* ext/xvid/gstxviddec.c:
* ext/xvid/gstxvidenc.c:
correct klasses. Mostly s,Codec/(Audio|Video),\1/Codec,
(fixes #142193)