fix(protocol): preallocate return struct (#914)

Signed-off-by: Chris Gianelloni <[email protected]>

Author: wolf31o2

protocol/state.go

@@ -27,7 +27,7 @@ const (
 	AgencyServer ProtocolStateAgency = 2 // Server agency
 )
 
-// State represents protocol state with both a numeric ID and a string identifer
+// State represents protocol state with both a numeric ID and a string identifier
 type State struct {
 	Id   uint
 	Name string

protocol/txsubmission/server.go

@@ -122,7 +122,7 @@ func (s *Server) RequestTxIds(
 
 // RequestTxs requests the content of the requested TX identifiers from the remote node's mempool
 func (s *Server) RequestTxs(txIds []TxId) ([]TxBody, error) {
-	var txString []string
+	txString := []string{}
 	for _, t := range txIds {
 		ba := []byte{}
 		for _, b := range t.TxId {