fix: getPeers size check (#2417)

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## Overview

Duplicate of #2408, was reverted
in #2394

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Co-authored-by: pthmas <9058370+pthmas@users.noreply.github.com>

Author: Manav-Aggarwal

pkg/sync/sync_service.go

@@ -382,10 +382,11 @@ func (syncService *SyncService[H]) getPeerIDs() []peer.ID {
 
 func getPeers(seeds string, logger log.Logger) []peer.ID {
 	var peerIDs []peer.ID
-	sl := strings.Split(seeds, ",")
-	if len(sl) == 0 {
+	if seeds == "" {
 		return peerIDs
 	}
+	sl := strings.Split(seeds, ",")
+
 	for _, seed := range sl {
 		maddr, err := multiaddr.NewMultiaddr(seed)
 		if err != nil {