Fix infinite loop

ryzom/client/src/interface_v3/chat_window.cpp

@@ -208,6 +208,7 @@ void CChatWindow::displayMessage(const ucstring &msg, NLMISC::CRGBA col, CChatGr
 {
 	if (!_Chat)
 	{
+		if (msg.toUtf8() != "WRN: <CChatWindow::displayMessage> There's no global chat")
 			nlwarning("<CChatWindow::displayMessage> There's no global chat");
 		return;
 	}
@@ -541,6 +542,7 @@ void CChatGroupWindow::displayMessage(const ucstring &msg, NLMISC::CRGBA col, CC
 {
 	if (!_Chat)
 	{
+		if (msg.toUtf8() != "WRN: <CChatGroupWindow::displayMessage> There's no global chat")
 			nlwarning("<CChatGroupWindow::displayMessage> There's no global chat");
 		return;
 	}