Fix a bug where we try to fetch emote "" for messages with no emotes

chat_archiver/chat_archiver/main.py

@@ -214,7 +214,7 @@ class Archiver(object):
 			self.logger.debug("Got message: {}".format(data))
 			messages_received.labels(channel=self.channel, client=id(self), command=message.command).inc()
 
-			if data['tags'] and 'emotes' in data['tags']:
+			if data.get('tags', {}).get('emotes', '') != '':
 				emote_specs = data['tags']['emotes'].split('/')
 				emote_ids = [emote_spec.split(':')[0] for emote_spec in emote_specs]
 				ensure_emotes(self.base_dir, emote_ids)