Poll Plugin: Don't allow voting on closed topics.

plugins/poll/assets/javascripts/discourse/templates/poll.js.handlebars

@@ -1,7 +1,7 @@
 <table>
   {{#each poll.options}}
     <tr {{bind-attr class=checked:active}} {{action selectOption option}}>
-      <td class="radio"><input type="radio" name="poll" {{bind-attr checked=checked disabled=controller.loading}}></td>
+      <td class="radio"><input type="radio" name="poll" {{bind-attr checked=checked disabled=controller.disableRadio}}></td>
       <td class="option">
         <div class="option">
           {{{ option }}}

plugins/poll/assets/javascripts/poll_ui.js

@@ -38,8 +38,14 @@ var PollController = Discourse.Controller.extend({
   poll: null,
   showResults: false,
 
+  disableRadio: Em.computed.any('poll.post.topic.closed', 'loading'),
+
   actions: {
     selectOption: function(option) {
+      if (this.get('disableRadio')) {
+        return;
+      }
+
       if (!this.get('currentUser.id')) {
         this.get('postController').send('showLogin');
         return;