cmd/swarm-smoke: fix what we wanted to avoid (#1486)

cmd/swarm-smoke/upload_and_sync.go

@@ -39,8 +39,6 @@ import (
 	cli "gopkg.in/urfave/cli.v1"
 )
 
-const trackChunksPageSize = 7500
-
 func uploadAndSyncCmd(ctx *cli.Context) error {
 	// use input seed if it has been set
 	if inputSeed != 0 {
@@ -180,13 +178,14 @@ func trackChunks(testData []byte, submitMetrics bool) error {
 // getChunksBitVectorFromHost returns a bit vector of presence for a given slice of chunks from a given host
 func getChunksBitVectorFromHost(client *rpc.Client, addrs []storage.Address) (string, error) {
 	var hostChunks string
+	const trackChunksPageSize = 7500
 
 	for len(addrs) > 0 {
 		var pageChunks string
 		// get current page size, so that we avoid a slice out of bounds on the last page
 		pagesize := trackChunksPageSize
-		if cap(addrs) < trackChunksPageSize {
-			pagesize = cap(addrs)
+		if len(addrs) < trackChunksPageSize {
+			pagesize = len(addrs)
 		}
 
 		err := client.Call(&pageChunks, "bzz_has", addrs[:pagesize])