Unbreak dlls/winhttp on FreeBSD (and likely other BSDs/Darwin)

[Hans Leidekker]

On Wednesday 20 August 2008 20:34:43 Gerald Pfeifer wrote:

> This minor change on top of Hans' contributions in the recent days
> unbreaks the build on FreeBSD (and likely other BSDs and possibly
> Darwin/MacOS).

Thanks. I didn't want to copy all of the ifdef blocks from wininet
because I can't verify which ones are actually needed. So I'm counting
on people like you to fix this up, and I'm sure I'll need your help
again :)

 -Hans