message: Add warning log for empty socket messages
diff: @@ -197,7 +197,11 @@ module.exports = function(botkit, config) {
  botkit.trigger('rtm_open', [bot]);
  bot.rtm.on('message', function(data) {
  -
  + // Distinguish between empty data and malformed JSON
  + if (!data || data.trim() === '') {
  + console.warn('** RECEIVED EMPTY DATA FROM SLACK:', data);
  + return;
  + }
  var message = null;
  try {
  message = JSON.parse(data);
  