src: remove usage of extended sizeof
src: remove usage of extended sizeof

It's not supported in VS2013.

PR-URL: https://github.com/node-forward/node/pull/38
Reviewed-By: Ben Noordhuis <59bd0a3ff43b32849b319e645d4798d8a5d1e889@bnoordhuis.nl>

dreamllq/node,dreamllq/node,dreamllq/node,dreamllq/node,dreamllq/node,dreamllq/node,dreamllq/node,dreamllq/node,dreamllq/node