icecandidate event with no candidate

Hi

I got some offline feedback from a user of our API, regarding the way we 
signal that the gathering process is done. The comment was: "Why do I 
get an icecandidate event without a candidate? That's like a 
mouse-click-event that says that the mouse wasn't clicked."

If we want to change this behavior, there are a bunch of alternatives. 
Here are two:

One variant is to set the iceGatheringState to "complete" when the last 
candidate is emitted. This approach is a bit dependent on if the UA can 
figure out if this is the last candidate without delaying it (too much).

pc.onicecandidate = function (evt) {
     dealWithCandidate(evt.candidate);
     if (pc.iceGatheringState == "complete")
         sendOfferOrAnswer();
};

An other option is to simply use separate events.

// separate events
pc.onicecandidate = function (evt) {
     dealWithCandidate(evt.candidate);
};

pc.onicegatheringcomplete = function () {
     sendOfferOrAnswer();
};

/Adam