[notabug] Duplicate Chat Message Check doesn't work with EVENT_CHAT_MESSAGE_CHANNEL

[aldericon]

I've been working a lot recently with the event EVENT_CHAT_MESSAGE_CHANNEL, which allows you to see what's being posted in chat. I've noticed that if you try to post the same message twice - easily done with addons like pChat, where you can press the 'up' arrow to get what you just posted - it won't actually post to chat, but the EVENT_CHAT_MESSAGE_CHANNEL still fires.

Just wanted to post here to see if this was working as intended. It's funny sometimes because I get a bunch of the same chat message in a few seconds but only one copy in chat.