Fixed bug, toObject should use other object's toObject

lib/block.js

@@ -149,7 +149,7 @@ Block.fromRawBlock = function fromRawBlock(data) {
 Block.prototype.toObject = function toObject() {
   var txs = [];
   this.txs.forEach(function(tx) {
-    txs.push(tx.toJSON());
+    txs.push(tx.toObject());
   });
   return {
     magicnum: this.magicnum,

lib/transaction/transaction.js

@@ -144,11 +144,11 @@ Transaction.prototype.fromJSON = function(json) {
 Transaction.prototype.toObject = function toObject() {
   var inputs = [];
   this.inputs.forEach(function(input) {
-    inputs.push(input.toJSON());
+    inputs.push(input.toObject());
   });
   var outputs = [];
   this.outputs.forEach(function(output) {
-    outputs.push(output.toJSON());
+    outputs.push(output.toObject());
   });
   return {
     version: this.version,