Fixes NPE.

videolayout.js

@@ -2005,7 +2005,7 @@ var VideoLayout = (function (my) {
         }
 
         var resolutionValue = null;
-        if(this.resolution)
+        if(this.resolution && this.jid != null)
         {
             var keys = Object.keys(this.resolution);
             if(keys.length == 1)