Fix a memory leak in the afalg engine
Fix a memory leak in the afalg engine

The AFALG engine created a global EVP_CIPHER instance but was not freeing
it up when the engine was destroyed.

Reviewed-by: Rich Salz <c04971a99e5a9ee80eaab4b1deb37e845b0bd697@openssl.org>

openssl/openssl,openssl/openssl,openssl/openssl,openssl/openssl,openssl/openssl,openssl/openssl