p2p, swarm/network/kademlia: use IsZero to check for zero time (#15603)

p2p/dial.go

@@ -157,7 +157,7 @@ func (s *dialstate) removeStatic(n *discover.Node) {
 }
 
 func (s *dialstate) newTasks(nRunning int, peers map[discover.NodeID]*Peer, now time.Time) []task {
-	if s.start == (time.Time{}) {
+	if s.start.IsZero() {
 		s.start = now
 	}
 

swarm/network/kademlia/kaddb.go

@@ -330,7 +330,7 @@ func (self *KadDb) load(path string, cb func(*NodeRecord, Node) error) (err erro
 				}
 			}
 			n++
-			if (node.After == time.Time{}) {
+			if node.After.IsZero() {
 				node.After = time.Now()
 			}
 			self.index[node.Addr] = node