Add additional check to avoid broadcasting private messages in error …

…conditions

src/server.cpp

@@ -4385,6 +4385,10 @@ void Server::notifyPlayer(const char *name, const std::wstring msg, const bool p
 	Player *player = m_env->getPlayer(name);
 	if(!player)
 		return;
+
+	if (player->peer_id == PEER_ID_INEXISTENT)
+		return;
+
 	if (prepend)
 		SendChatMessage(player->peer_id, std::wstring(L"Server -!- ")+msg);
 	else