Fix minor portability problem

include/lber.h

@@ -584,11 +584,11 @@ ber_bvdup LDAP_P((
 
 LBER_F( struct berval * )
 ber_mem2bv LDAP_P((
-	LDAP_CONST char *, ber_len_t len, int dup, struct berval *bv));
+	LDAP_CONST char *, ber_len_t len, int duplicate, struct berval *bv));
 
 LBER_F( struct berval * )
 ber_str2bv LDAP_P((
-	LDAP_CONST char *, ber_len_t len, int dup, struct berval *bv));
+	LDAP_CONST char *, ber_len_t len, int duplicate, struct berval *bv));
 
 #define	ber_bvstr(a)	((ber_str2bv)((a), 0, 0, NULL))
 #define	ber_bvstrdup(a)	((ber_str2bv)((a), 0, 1, NULL))