rand.erl: fix member "type" Pair in alg_handler()
rand.erl: fix member "type" Pair in alg_handler()

* See <https://github.com/erlang/otp/pull/1235/files/5409c216e74addda541f1d68d8d0f53abab150cb#r86529219>

jj1bdx/emprng,jj1bdx/emprng