Merge pull request #3515 from antobinary/fix-double-webcams

Fix double display of webcams on reconnect #3250

bigbluebutton-client/src/org/bigbluebutton/modules/videoconf/maps/VideoEventMapDelegate.as

@@ -293,7 +293,7 @@ package org.bigbluebutton.modules.videoconf.maps
     }
 
     private function openViewWindowFor(userID:String):void {
-      if (!proxy.connection.connected) {
+      if (!proxy.connection.connected || hasWindow(userID)) {
         return;
       }