remove useless size increasing cast which introduces a read of uninitialized memory

emper/Debug.cpp

@@ -15,7 +15,7 @@ void worker_log(const std::string& prefix, const std::string& message) {
 	const workerid_t workerId = Runtime::getWorkerId();
 
 	std::unique_lock<std::mutex> lock(worker_log_mutex);
-	std::cerr << (unsigned int)workerId;
+	std::cerr << workerId;
 	if (!prefix.empty()) {
 		std::cerr << " " << prefix << " ";
 	} else {