win: DRY uv_poll_close()
win: DRY uv_poll_close()

PR-URL: https://github.com/libuv/libuv/pull/2746
Reviewed-By: Bartosz Sosnowski <aa4e0bd35c562885f21ad74b171c23cfc4370e31@janeasystems.com>
Reviewed-By: erw7 <51d0271fb80edec22f506d99ee3ff3d413519634@gmail.com>

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