fixup! chore: short-circuit unnecessary message processing

Author: rvagg

impl/graphsync.go

@@ -476,10 +476,10 @@ func (gsr *graphSyncReceiver) ReceiveMessage(
 	blocks := incoming.Blocks()
 
 	if len(requests) > 0 {
-		gsr.graphSync().responseManager.ProcessRequests(ctx, sender, incoming.Requests())
+		gsr.graphSync().responseManager.ProcessRequests(ctx, sender, requests)
 	}
 	if len(responses) > 0 || len(blocks) > 0 {
-		gsr.graphSync().requestManager.ProcessResponses(sender, incoming.Responses(), incoming.Blocks())
+		gsr.graphSync().requestManager.ProcessResponses(sender, responses, blocks)
 	}
 }