Added cold-persistance to Channel Chat Buffer via periodic DB saves based on chat activity.

src/app/channel/chatHandler.js

@@ -141,7 +141,7 @@ module.exports = class{
         const channel = this.server.activeChannels.get(chan);
 
         //If chat buffer length is over mandated size
-        if(channel.chatBuffer.length >= this.chatBufferSize){
+        if(channel.chatBuffer.buffer.length >= this.chatBufferSize){
             //Take out oldest chat
             channel.chatBuffer.shift();
         }