Don't use data type long.

AVCodecContext's width and height (where this
information comes from) are also just integer.

Additionally, make Image an unsigned char pointer.


git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@37092 b3059339-0415-0410-9bf9-f77b7e298cf2
Revise skin documentation.


git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@37093 b3059339-0415-0410-9bf9-f77b7e298cf2