* we can do faster division if the remainder is not required.
*/
/* r := 2^len / m */
-int BN_reciprocal(BIGNUM *r, const BIGNUM *m, size_t len, BN_CTX *ctx)
+int BN_reciprocal(BIGNUM *r, const BIGNUM *m, int len, BN_CTX *ctx)
{
int ret= -1;
BIGNUM *t;