Coverity: fix 272011 resource leak

Reviewed-by: Tomas Mraz <tomas@openssl.org>
Reviewed-by: Nicola Tuveri <nic.tuv@gmail.com>
Reviewed-by: Shane Lontis <shane.lontis@oracle.com>
(Merged from https://github.com/openssl/openssl/pull/19900)

(cherry picked from commit a167e048a4)

apps/speed.c

@@ -3506,6 +3506,7 @@ static int do_multi(int multi, int size_num)
         if ((f = fdopen(fds[n], "r")) == NULL) {
             BIO_printf(bio_err, "fdopen failure with 0x%x\n",
                        errno);
+            OPENSSL_free(fds);
             return 1;
         }
         while (fgets(buf, sizeof(buf), f)) {