Fix inspect method so it doesn't fail on incomplete TX

lib/transaction/transaction.js

@@ -114,7 +114,7 @@ Transaction.prototype.serialize = function(unsafe) {
   }
 };
 
-Transaction.prototype.uncheckedSerialize = Transaction.prototype.toString = function() {
+Transaction.prototype.uncheckedSerialize = function() {
   return this.toBuffer().toString('hex');
 };
 
@@ -161,7 +161,7 @@ Transaction.prototype._hasDustOutputs = function() {
 };
 
 Transaction.prototype.inspect = function() {
-  return '<Transaction: ' + this.toString() + '>';
+  return '<Transaction: ' + this.uncheckedSerialize() + '>';
 };
 
 Transaction.prototype.toBuffer = function() {