MSVC build failed since r10880

MSVC build failed since r10880 because there's no s6_addr16 and s6_addr32 in MS Platform SDK.

structure details in MSDN: http://msdn2.microsoft.com/en-us/library/ms738664.aspx

[Automatically added by flyspray2trac: Operating System: Windows 2k/XP]

Trac:
Username: roytam1