implement the same protection we did for publish on view

bigbluebutton-client/src/org/bigbluebutton/modules/videoconf/views/UserVideo.as

@@ -39,6 +39,11 @@ package org.bigbluebutton.modules.videoconf.views
     }
 
     public function publish(camIndex:int, videoProfile:VideoProfile):void {
+      if (_shuttingDown) {
+        LOGGER.warn("Method publish called while shutting down the video window, ignoring...");
+        return;
+      }
+
       _camIndex = camIndex;
       _videoProfile = videoProfile;
       setOriginalDimensions(_videoProfile.width, _videoProfile.height);
@@ -79,16 +84,14 @@ package org.bigbluebutton.modules.videoconf.views
     }
 
     private function startPublishing():void {
-      if(!_shuttingDown){
-        _streamName = newStreamName();
-        _shuttingDown = false;
-
-        var e:StartBroadcastEvent = new StartBroadcastEvent();
-        e.stream = _streamName;
-        e.camera = _video.getCamera();
-        e.videoProfile = _videoProfile;
-        _dispatcher.dispatchEvent(e);
-      }
+      _streamName = newStreamName();
+      _shuttingDown = false;
+
+      var e:StartBroadcastEvent = new StartBroadcastEvent();
+      e.stream = _streamName;
+      e.camera = _video.getCamera();
+      e.videoProfile = _videoProfile;
+      _dispatcher.dispatchEvent(e);
     }
 
     public function shutdown():void {
@@ -126,6 +129,11 @@ package org.bigbluebutton.modules.videoconf.views
     }
 
     public function view(connection:NetConnection, streamName:String):void {
+      if (_shuttingDown) {
+        LOGGER.warn("Method view called while shutting down the video window, ignoring...");
+        return;
+      }
+
       _streamName = streamName;
       _shuttingDown = false;