Skinned mesh SIMD implementation.

Signed-off-by: John McCutchan <john@johnmccutchan.com>
80 columns.

Signed-off-by: John McCutchan <john@johnmccutchan.com>
Pass in 0 filled buffer instead of null.

Signed-off-by: John McCutchan <john@johnmccutchan.com>