Build fail with MacOs in connectivity part

[Tor Lillqvist]

> I suppose it's 64 bits since config.log displays this:
> build='x86_64-apple-darwin13.2.0'
> build_cpu='x86_64'
> host_cpu='x86_64'

Nope. That is misleading. For Windows, Mac and iOS, we don't use
autofoo to decide whether to build 32- or 64-bit code. Instead, we
build 32-bit, unless you specifically ask for 64-bit code with the
--enable-64-bit configure option. (And note that for Windows a 64-bit
build does not work, don't even try, unless you want to work on that.)

--tml