add client check

src/js/controllers/buyCoinbase.js

@@ -3,7 +3,6 @@
 angular.module('copayApp.controllers').controller('buyCoinbaseController',
   function($scope, $modal, $log, $ionicModal, $timeout, lodash, profileService, coinbaseService, bwsError, addressService) {
     var self = this;
-    var fc;
 
     this.init = function(testnet) {
       self.allWallets = profileService.getWallets(testnet ? 'testnet' : 'livenet', 1)

src/js/controllers/sellCoinbase.js

@@ -142,6 +142,11 @@ angular.module('copayApp.controllers').controller('sellCoinbaseController',
     this.createTx = function(token, account, amount) {
       self.error = null;
 
+      if (!client) {
+        self.error = 'No wallet selected';
+        return;
+      }
+
       var accountId = account.id;
       var dataSrc = {
         name: 'Received from Copay: ' + self.selectedWalletName

src/js/controllers/sellGlidera.js

@@ -94,6 +94,11 @@ angular.module('copayApp.controllers').controller('sellGlideraController',
       var configWallet = config.wallet;
       var walletSettings = configWallet.settings;
 
+      if (!client) {
+        self.error = 'No wallet selected';
+        return;
+      }
+
       addressService.getAddress(client.credentials.walletId, null, function(err, refundAddress) {
         if (!refundAddress) {
           self.loading = null;