Fix build warnings.

crypto/bn/bn_nist.c

@@ -715,7 +715,6 @@ int BN_nist_mod_521(BIGNUM *r, const BIGNUM *a, const BIGNUM *field,
 #define BN_NIST_521_TOP_MASK	(BN_ULONG)0x1FF
 #endif
 	int	top, ret = 0;
-	BN_ULONG *r_d;
 	BIGNUM	*tmp;
 
 	field = &_bignum_nist_p_521; /* just to make sure */

crypto/x509/x509_vfy.c

@@ -823,7 +823,7 @@ static int get_crl_sk(X509_STORE_CTX *ctx, X509_CRL **pcrl, X509_CRL **pdcrl,
 	unsigned int reasons, best_reasons = 0;
 	X509 *x = ctx->current_cert;
 	X509_CRL *crl, *best_crl = NULL;
-	X509 *crl_issuer, *best_crl_issuer = NULL;
+	X509 *crl_issuer = NULL, *best_crl_issuer = NULL;
 
 	for (i = 0; i < sk_X509_CRL_num(crls); i++)
 		{

crypto/x509v3/v3_ncons.c

@@ -458,7 +458,7 @@ static int nc_uri(ASN1_IA5STRING *uri, ASN1_IA5STRING *base)
 	const char *baseptr = (char *)base->data;
 	const char *hostptr = (char *)uri->data;
 	const char *p = strchr(hostptr, ':');
-	size_t hostlen;
+	int hostlen;
 	/* Check for foo:// and skip past it */
 	if (!p || (p[1] != '/') || (p[2] != '/'))
 		return X509_V_ERR_UNSUPPORTED_NAME_SYNTAX;
@@ -493,7 +493,7 @@ static int nc_uri(ASN1_IA5STRING *uri, ASN1_IA5STRING *base)
 		return X509_V_ERR_PERMITTED_VIOLATION;
 		}
 
-	if ((base->length != hostlen) || strncasecmp(hostptr, baseptr, hostlen))
+	if ((base->length != (int)hostlen) || strncasecmp(hostptr, baseptr, hostlen))
 		return X509_V_ERR_PERMITTED_VIOLATION;
 
 	return X509_V_OK;