Fix npe

src/controllers/organisms/MemberList.js

@@ -62,6 +62,7 @@ module.exports = {
     },
 
     roomMembers: function(limit) {
+        if (!this.props.roomId) return {};
         var cli = MatrixClientPeg.get();
         var all_members = cli.getRoom(this.props.roomId).currentState.members;
         var all_user_ids = Object.keys(all_members);