Fix for afk

diff --git a/src/server/game/Handlers/ChatHandler.cpp b/src/server/game/Handlers/ChatHandler.cpp
index 07d1228..353f51b 100644
--- a/src/server/game/Handlers/ChatHandler.cpp
+++ b/src/server/game/Handlers/ChatHandler.cpp
@@ -271,7 +271,7 @@ void WorldSession::HandleMessagechatOpcode(WorldPacket& recvData)
          }
    }

-    if (sender->isGMChat() && sWorld->getBoolConfig(CONFIG_GM_BLUE_CHAT_ENABLE))
+    if (sender->isGMChat() && sWorld->getBoolConfig(CONFIG_GM_BLUE_CHAT_ENABLE) && !msg.empty())
        msg = "|cff2998ff" + msg + "|r";

    switch (type)