Workaround bogus libport LIBPORT_WIN32.
Workaround bogus libport LIBPORT_WIN32.

	...which is only set for VC++ and not mingw.
	* lib/libport/timer.cc: Include detect_win32.h, use WIN32 macro.

aldebaran/libport,aldebaran/libport,aldebaran/libport,aldebaran/libport,aldebaran/libport