Fix a possible leak on NETSCAPE_SPKI_verify failure.

Reviewed-by: Stephen Henson <steve@openssl.org>
Reviewed-by: Rich Salz <rsalz@openssl.org>

apps/ca.c

@@ -2071,6 +2071,7 @@ static int certify_spkac(X509 **xret, char *infile, EVP_PKEY *pkey,
 
     j = NETSCAPE_SPKI_verify(spki, pktmp);
     if (j <= 0) {
+        EVP_PKEY_free(pktmp);
         BIO_printf(bio_err,
                    "signature verification failed on SPKAC public key\n");
         goto end;