Never test for select() on windows

Never test for select() on windows

On 64-bit windows, configure actually _finds_ select when it tests for
it, and due to the ordering of the io implementations in event.c it is
chosen over the win32select implementation.

This modification skips the test for select on win32 (we don't want
that anyway, because Windows has its own), causing my windows box to
get the win32select implementation.

(edited by Nick)