Have the few apps that accessed EVP_MD directly use accessors instead

Reviewed-by: NRich Salz <rsalz@openssl.org>

apps/ca.c

@@ -828,7 +828,7 @@ end_of_options:
         }
         if (verbose)
             BIO_printf(bio_err, "message digest is %s\n",
-                       OBJ_nid2ln(dgst->type));
+                       OBJ_nid2ln(EVP_MD_type(dgst)));
         if ((policy == NULL) && ((policy = NCONF_get_string(conf,
                                                             section,
                                                             ENV_POLICY)) ==

apps/speed.c

@@ -1687,7 +1687,7 @@ int speed_main(int argc, char **argv)
                 EVP_CIPHER_CTX_cleanup(&ctx);
             }
             if (evp_md) {
-                names[D_EVP] = OBJ_nid2ln(evp_md->type);
+                names[D_EVP] = OBJ_nid2ln(EVP_MD_type(evp_md));
                 print_message(names[D_EVP], save_count, lengths[j]);
 
                 Time_F(START);