edge: fix complete evaluation
edge: fix complete evaluation

if the ice gatherer finished before setLocalDescription
was called, this.transceivers would still be empty,
leading to emitting end-of-candidates being emitted too early.

jan-ivar/adapter,xdumaine/adapter,Acidburn0zzz/adapter,Acidburn0zzz/adapter,webrtc/adapter,Acidburn0zzz/adapter,jan-ivar/adapter,webrtc/adapter,xdumaine/adapter