Eliminate a warning: BN_mod_inverse() returns a (BIGNUM *) and remove and

unnecessary cast.

crypto/rsa/rsa_chk.c

@@ -131,8 +131,7 @@ int RSA_check_key(RSA *key)
 		}
 	
 	/* iqmp = q^-1 mod p? */
-	r = BN_mod_inverse(i, key->q, key->p, ctx);
-	if (!r) { ret = -1; goto err; }
+	if(!BN_mod_inverse(i, key->q, key->p, ctx)) { ret = -1; goto err; }
 
 	if (BN_cmp(i, key->iqmp) != 0)
 		{

crypto/rsa/rsa_gen.c

@@ -157,7 +157,7 @@ RSA *RSA_generate_key(int bits, unsigned long e_value,
 		goto err;
 		}
 */
-	rsa->d=(BIGNUM *)BN_mod_inverse(NULL,rsa->e,r0,ctx2);	/* d */
+	rsa->d=BN_mod_inverse(NULL,rsa->e,r0,ctx2);	/* d */
 	if (rsa->d == NULL) goto err;
 
 	/* calculate d mod (p-1) */