[master] address VS2015 compiler warning

diff --git a/lib/dns/rpz.c b/lib/dns/rpz.c
index cfc553eac02cc59d8ba125f9eb3db9b69dc41d52..551b19ff496eae6d24912f14fba9a8492cf9f1b4 100644 (file)
--- a/lib/dns/rpz.c
+++ b/lib/dns/rpz.c
@@ -512,7 +512,7 @@ fix_qname_skip_recurse(dns_rpz_zones_t *rpzs) {
                 * more significant bits are 0. (For instance,
                 * 0x0700 => 0x00ff, 0x0007 => 0x0000)
                 */
-               mask = ~(zbits_req | -zbits_req);
+               mask = ~(zbits_req | ((~zbits_req) + 1));
 
                /*
                 * As mentioned in (2) above, the zone corresponding to