Simplify script to address method

lib/script/script.js

@@ -707,13 +707,10 @@ Script.fromAddress = function(address) {
 Script.prototype.toAddress = function(network) {
   network = Networks.get(network);
   $.checkArgument(network, 'Must provide a network');
-  if (this.isPublicKeyHashOut()) {
-    return new Address(this.getData(), network, Address.PayToPublicKeyHash);
-  } else if (this.isScriptHashOut()) {
-    return new Address(this.getData(), network, Address.PayToScriptHash);
-  } else {
-    throw new Error('The script type needs to be PayToPublicKeyHash or PayToScriptHash');
+  if (this.isPublicKeyHashOut() || this.isScriptHashOut()) {
+    return new Address(this, network);
   }
+  throw new Error('The script type needs to be PayToPublicKeyHash or PayToScriptHash');
 };
 
 /**