[openssl/openssl] f95fec: crypto/evp/bio_b64.c: improve coding style

[David von Oheimb]

  Branch: refs/heads/master
  Home:   https://github.openssl.org/openssl/openssl
  Commit: f95fec293800b47e5eff0f08daefcf1397a24423
      https://github.openssl.org/openssl/openssl/commit/f95fec293800b47e5eff0f08daefcf1397a24423
  Author: Dr. David von Oheimb <David.von.Oheimb at siemens.com>
  Date:   2022-07-14 (Thu, 14 Jul 2022)

  Changed paths:
    M crypto/evp/bio_b64.c

  Log Message:
  -----------
  crypto/evp/bio_b64.c: improve coding style

Reviewed-by: Hugo Landau <hlandau at openssl.org>
Reviewed-by: Tomas Mraz <tomas at openssl.org>
Reviewed-by: Paul Dale <pauli at openssl.org>
(Merged from https://github.com/openssl/openssl/pull/18787)