made forceAdd operate singular

network/gateway/hostPool.go

@@ -284,33 +284,21 @@ func (h *HostPool) replaceHost(newId *id.ID, oldPoolIndex uint32) error {
 }
 
 // Force-add the Gateways to the HostPool, each replacing a random Gateway
-func (h *HostPool) forceAdd(gwIds []*id.ID) error {
+func (h *HostPool) forceAdd(gwId *id.ID) error {
 	rng := h.rng.GetStream()
 	h.hostMux.Lock()
 	defer h.hostMux.Unlock()
 	defer rng.Close()
 
-	checked := make(map[uint32]interface{}) // Keep track of Hosts already replaced
-	for i := 0; i < len(gwIds); {
 	// Verify the GwId is not already in the hostMap
-		if _, ok := h.hostMap[*gwIds[i]]; ok {
+	if _, ok := h.hostMap[*gwId]; ok {
 		// If it is, skip
-			i++
-			continue
+		return nil
 	}
 
 	// Randomly select another Gateway in the HostPool for replacement
 	poolIdx := readRangeUint32(0, h.poolParams.PoolSize, rng)
-		if _, ok := checked[poolIdx]; !ok {
-			err := h.replaceHost(gwIds[i], poolIdx)
-			if err != nil {
-				return err
-			}
-			checked[poolIdx] = nil
-			i++
-		}
-	}
-	return nil
+	return h.replaceHost(gwId, poolIdx)
 }
 
 // Updates the internal HostPool with any changes to the NDF

network/gateway/sender.go

@@ -43,7 +43,7 @@ func (s *Sender) SendToSpecific(target *id.ID,
 	if ok {
 		result, didAbort, err := sendFunc(host, target)
 		if err == nil {
-			return result, s.forceAdd([]*id.ID{host.GetId()})
+			return result, s.forceAdd(target)
 		} else {
 			if didAbort {
 				return nil, errors.WithMessagef(err, "Aborted SendToSpecific gateway %s", host.GetId().String())