preprocess check

Author: shakty

lib/rooms/WaitingRoom.js

@@ -795,8 +795,10 @@ WaitingRoom.prototype.parseSettings = function(settings) {
  throw new TypeError(where + 'REMOTE_DISPATCH invalid ' +
  'or missing url. Found: ' + r);
  }
- // TODO check function.
- // if (r.preprocess && 'function' !== typeof r.preprocess)
+ if (r.preprocess && 'function' !== typeof r.preprocess) {
+ throw new TypeError(where + 'REMOTE_DISPATCH.preprocess must be ' +
+ 'function or undefined. Found: ' + r.preprocess);
+ }
  this.REMOTE_DISPATCH = r;
  }