initGui NPE

[JackOfNoneTrades]

public class GuiChatTC extends GuiChat {
[...]
@Override
    public void initGui() {
[...]
if (this.tc.enabled()) {
    if (this.scrollBar == null)
        this.scrollBar = new ChatScrollBar();
    for (ChatChannel chan : this.tc.channelMap.values()) {
        this.buttonList.add(chan.tab);
    }
}
else {
    this.buttonList.add(this.tc.channelMap.get("*").tab);
}

this.tc.channelMap.get("*") is sometimes null and results in an NPE when tabbychat is disabled in its settings.