ws2_32: Fix broadcast address calculation

[Juan Lang]

Who wrote such a piece of crap, anyway? ;)
http://www.winehq.org/pipermail/wine-cvs/2003-May/006108.html

Verified using test program here:
http://tangentsoft.net/wskfaq/examples/getifaces.html
--Juan
-------------- next part --------------
An embedded and charset-unspecified text was scrubbed...
Name: 0005-Fix-broadcast-address-calculation.txt
Url: http://www.winehq.org/pipermail/wine-patches/attachments/20071012/cf9c3448/attachment.txt