fix network in wallet secret

lib/clientlib.js

@@ -87,6 +87,8 @@ ClientLib.prototype._loadAndCheck = function() {
 ClientLib.prototype.createWallet = function(walletName, copayerName, m, n, network, cb) {
   var self = this;
   network = network || 'livenet';
+  if (!_.contains(['testnet', 'livenet'], network))
+    return cb('Invalid network');
 
   var data = this._load();
   if (data) return cb('File ' + this.filename + ' already contains a wallet');
@@ -122,7 +124,7 @@ ClientLib.prototype.createWallet = function(walletName, copayerName, m, n, netwo
     }
 
     var walletId = body.walletId;
-    var secret = walletId + ':' + privKey.toString() + ':' + (network ? 'T' : 'L');
+    var secret = walletId + ':' + privKey.toString() + ':' + (network == 'testnet' ? 'T' : 'L');
     data.secret = secret;
 
     self._save(data);