for idct_put on architectures/compilers that have problems aligning on the stack.
Originally committed as revision 18924 to svn://svn.ffmpeg.org/ffmpeg/trunk
Consistently apply this rule: the guard name is obtained from the
filename by stripping the leading "lib", converting '/' and '.' to
'_' and uppercasing the resulting name. Guard names in the root
directory have to be prefixed by "FFMPEG_".
Originally committed as revision 15120 to svn://svn.ffmpeg.org/ffmpeg/trunk
it is only used there and is only 128 byte large.
Also make it aligned to fix playback with altivec.
Originally committed as revision 6902 to svn://svn.ffmpeg.org/ffmpeg/trunk
