[openssl/openssl] 050ddd: crypto/sm2/sm2_sign.c: Add BN_CTX_end

[JiashengJiang]

  Branch: refs/heads/master
  Home:   https://github.com/openssl/openssl
  Commit: 050dddb06162a8016c004317273f8f01b72ac20a
      https://github.com/openssl/openssl/commit/050dddb06162a8016c004317273f8f01b72ac20a
  Author: Jiasheng Jiang <jiasheng at iscas.ac.cn>
  Date:   2023-06-13 (Tue, 13 Jun 2023)

  Changed paths:
    M crypto/sm2/sm2_sign.c

  Log Message:
  -----------
  crypto/sm2/sm2_sign.c: Add BN_CTX_end

To match the BN_CTX_start, it should be better to add
BN_CTX_end in the end of the function.

Signed-off-by: Jiasheng Jiang <jiasheng at iscas.ac.cn>

Reviewed-by: Tom Cosgrove <tom.cosgrove at arm.com>
Reviewed-by: Tomas Mraz <tomas at openssl.org>
(Merged from https://github.com/openssl/openssl/pull/19266)