[openssl/openssl] 64c854: Fix bug in OPENSSL_LH_flush

[Hugo Landau]

  Branch: refs/heads/openssl-3.0
  Home:   https://github.openssl.org/openssl/openssl
  Commit: 64c85430f95200b6b51fe9475bd5203f7c19daf1
      https://github.openssl.org/openssl/openssl/commit/64c85430f95200b6b51fe9475bd5203f7c19daf1
  Author: Hugo Landau <hlandau at openssl.org>
  Date:   2022-04-25 (Mon, 25 Apr 2022)

  Changed paths:
    M crypto/lhash/lhash.c

  Log Message:
  -----------
  Fix bug in OPENSSL_LH_flush

Fixes #18139.

Reviewed-by: Richard Levitte <levitte at openssl.org>
Reviewed-by: Tomas Mraz <tomas at openssl.org>
(Merged from https://github.com/openssl/openssl/pull/18141)

(cherry picked from commit e5da68183410c06f7b350a0721bc2bd6057e438e)