[openssl/openssl] 3fbb36: Cast the argument to unsigned char when calling is...

[Michael Baentsch]

  Branch: refs/heads/openssl-3.0
  Home:   https://github.com/openssl/openssl
  Commit: 3fbb364b192c3568947d5e164cc29ebe6f992205
      https://github.com/openssl/openssl/commit/3fbb364b192c3568947d5e164cc29ebe6f992205
  Author: Michael Baentsch <57787676+baentsch at users.noreply.github.com>
  Date:   2023-06-06 (Tue, 06 Jun 2023)

  Changed paths:
    M apps/s_client.c
    M crypto/LPdir_unix.c
    M engines/e_loader_attic.c
    M providers/implementations/storemgmt/file_store.c
    M test/testutil/provider.c

  Log Message:
  -----------
  Cast the argument to unsigned char when calling isdigit()

Fixes #21123

Reviewed-by: Matt Caswell <matt at openssl.org>
Reviewed-by: Paul Dale <pauli at openssl.org>
Reviewed-by: Tomas Mraz <tomas at openssl.org>
(Merged from https://github.com/openssl/openssl/pull/21127)

(cherry picked from commit 8229874476cc2955e6947cf6d3fee09e13b8c160)