FIX: remove bogus v4 free-block

src/components/DNSRecordTypeCard.vue

@@ -464,7 +464,7 @@ export default {
           const containing_blocks = []
           let last_chg_ip = cur + 1
           let last_was_reserved = ipaddress.int_to_ip(last_chg_ip) in this.reserved_addrs_by_ip
-          if (this.reserved_addrs_by_ip.length > 0) {
+          if (Object.keys(this.reserved_addrs_by_ip).length > 0) {
             for (var k = 1; k < hard_maximum - cur; k++) {
               if (ipaddress.int_to_ip(cur + k) in this.reserved_addrs_by_ip) {
                 if (!last_was_reserved) {
@@ -488,12 +488,6 @@ export default {
                 }
               }
             }
-          } else {
-            containing_blocks.push({
-              first: ipaddress.int_to_ip(blk.lower),
-              type: 'free',
-              space: blk.upper - blk.lower,
-            })
           }
           if (hard_maximum - cur > 1) {
             if (last_was_reserved) {