Fix buffer closing

0cbf5fc4 uncovered an old bug
Thanks for noticing, @torhve

js/glowingbear.js

@@ -40,8 +40,8 @@ weechat.factory('handlers', ['$rootScope', 'models', 'plugins', function($rootSc
 
     var handleBufferClosing = function(message) {
         var bufferMessage = message.objects[0].content[0];
-        var buffer = new models.Buffer(bufferMessage);
+        var bufferId = bufferMessage.pointers[0];
-        models.closeBuffer(buffer);
+        models.closeBuffer(bufferId);
     };
 
     var handleLine = function(line, manually) {

js/models.js

@@ -506,11 +506,16 @@ models.service('models', ['$rootScope', '$filter', function($rootScope, $filter)
      * @return undefined
      */
     this.closeBuffer = function(bufferId) {
-        var wasActive = this.model.buffers[bufferId.id].active;
+        var buffer = this.getBuffer(bufferId);
-        if (wasActive) {
+        // Check if the buffer really exists, just in case
+        if (buffer === undefined) {
+            return;
+        }
+        if (buffer.active) {
             var firstBuffer = _.keys(this.model.buffers)[0];
             this.setActiveBuffer(firstBuffer);
         }
-        delete(this.model.buffers[bufferId.id]);
+        // Can't use `buffer` here, needs to be deleted from the list
+        delete(this.model.buffers[bufferId]);
     };
 }]);