win: properly return UV_EBADF when _close() fails
win: properly return UV_EBADF when _close() fails

Previously, libuv didn't return the correct error code when attempting
to close an invalid file descriptor with `uv_fs_close()`.

PR-URL: https://github.com/libuv/libuv/pull/613
Reviewed-by: Bert Belder <9f2ff180696da386c1be31b4507155616db25dc6@gmail.com>

unknownbrackets/maxcso,unknownbrackets/maxcso,unknownbrackets/maxcso,unknownbrackets/maxcso,unknownbrackets/maxcso,unknownbrackets/maxcso,unknownbrackets/maxcso