dsputil: Split off H.263 bits into their own H263DSPContext
h263dsp: K&R formatting cosmetics

Also remove array element numbering comments.
Merge commit '0338c396987c82b41d322630ea9712fe5f9561d6'

* commit '0338c396987c82b41d322630ea9712fe5f9561d6':
  dsputil: Split off H.263 bits into their own H263DSPContext

Conflicts:
	configure
	libavcodec/mpegvideo.h
	libavcodec/mpegvideo_enc.c

Merged-by: Michael Niedermayer <michaelni@gmx.at>
Merge remote-tracking branch 'qatar/master'

* qatar/master:
  h263dsp: K&R formatting cosmetics

Merged-by: Michael Niedermayer <michaelni@gmx.at>
avformat/icodec: reduce score returned on probing

The ico probe function is pretty weak just checking a few bytes for being 0, 1 or not 0

Fixes probetest failure

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>