dojox.socket.LongPoll will not fire events in IE

[Dmitrim]

The fire function in dojox.socket.LongPoll? should check for document.createEventObject, instead it tries to create event using document.createEvent("HTMLEvent") which will not work in IE. Basically the fire function should look something like this:

	function fire(type, object, deferred){
		if(socket["on" + type]){
            var event;
            if (document.createEventObject){
                event = document.createEventObject();
            }
            else{
                event = document.createEvent("HTMLEvents");
                event.initEvent(type, false, false);
            }
	        dojo.mixin(event, object);
		event.ioArgs = deferred && deferred.ioArgs;
		socket["on" + type](event);
        }

[Kris Zyp]

Duplicate of #14105.