eth: fix megacheck warnings

eth/sync.go

@@ -138,7 +138,9 @@ func (pm *ProtocolManager) syncer() {
 	defer pm.downloader.Terminate()
 
 	// Wait for different events to fire synchronisation operations
-	forceSync := time.Tick(forceSyncCycle)
+	forceSync := time.NewTicker(forceSyncCycle)
+	defer forceSync.Stop()
+
 	for {
 		select {
 		case <-pm.newPeerCh:
@@ -148,7 +150,7 @@ func (pm *ProtocolManager) syncer() {
 			}
 			go pm.synchronise(pm.peers.BestPeer())
 
-		case <-forceSync:
+		case <-forceSync.C:
 			// Force a sync even if not enough peers are present
 			go pm.synchronise(pm.peers.BestPeer())