RoomView: Correctly pass userId from matrix client

It isn't set in the state anywhere.

src/components/structures/RoomView.js

@@ -1604,7 +1604,7 @@ module.exports = React.createClass({
 
         var auxPanel = (
             <AuxPanel ref="auxPanel" room={this.state.room}
-              userId={this.state.userId}
+              userId={MatrixClientPeg.get().credentials.userId}
               conferenceHandler={this.props.ConferenceHandler}
               draggingFile={this.state.draggingFile}
               displayConfCallNotification={this.state.displayConfCallNotification}