Initialize bignum constants using BN_bin2bn() instead of BN_hex2bn(). This

saves a bit of space and avoids a compiler warning about string length.

crypto/bn/bn.h

@@ -739,16 +739,16 @@ BN_ULONG bn_add_words(BN_ULONG *rp, const BN_ULONG *ap, const BN_ULONG *bp,int n
 BN_ULONG bn_sub_words(BN_ULONG *rp, const BN_ULONG *ap, const BN_ULONG *bp,int num);
 
 /* Primes from RFC 2409 */
-int get_rfc2409_prime_768(BIGNUM **bn);
-int get_rfc2409_prime_1024(BIGNUM **bn);
+BIGNUM *get_rfc2409_prime_768(BIGNUM *bn);
+BIGNUM *get_rfc2409_prime_1024(BIGNUM *bn);
 
 /* Primes from RFC 3526 */
-int get_rfc3526_prime_1536(BIGNUM **bn);
-int get_rfc3526_prime_2048(BIGNUM **bn);
-int get_rfc3526_prime_3072(BIGNUM **bn);
-int get_rfc3526_prime_4096(BIGNUM **bn);
-int get_rfc3526_prime_6144(BIGNUM **bn);
-int get_rfc3526_prime_8192(BIGNUM **bn);
+BIGNUM *get_rfc3526_prime_1536(BIGNUM *bn);
+BIGNUM *get_rfc3526_prime_2048(BIGNUM *bn);
+BIGNUM *get_rfc3526_prime_3072(BIGNUM *bn);
+BIGNUM *get_rfc3526_prime_4096(BIGNUM *bn);
+BIGNUM *get_rfc3526_prime_6144(BIGNUM *bn);
+BIGNUM *get_rfc3526_prime_8192(BIGNUM *bn);
 
 int BN_bntest_rand(BIGNUM *rnd, int bits, int top,int bottom);