dthread: use INFINITE enum for second argument to WaitForSingleObject

Source/dthread.cpp

@@ -93,7 +93,7 @@ unsigned int __stdcall dthread_handler(void *)
 	DWORD dwMilliseconds;
 
 	while (dthread_running) {
-		if (!sgpInfoHead && WaitForSingleObject(sghWorkToDoEvent, 0xFFFFFFFF) == -1) {
+		if (!sgpInfoHead && WaitForSingleObject(sghWorkToDoEvent, INFINITE) == -1) {
 			error_buf = TraceLastError();
 			app_fatal("dthread4:\n%s", error_buf);
 		}
@@ -140,7 +140,7 @@ void dthread_cleanup()
 	dthread_running = FALSE;
 	SetEvent(sghWorkToDoEvent);
 	if (sghThread != INVALID_HANDLE_VALUE && glpDThreadId != GetCurrentThreadId()) {
-		if (WaitForSingleObject(sghThread, 0xFFFFFFFF) == -1) {
+		if (WaitForSingleObject(sghThread, INFINITE) == -1) {
 			error_buf = TraceLastError();
 			app_fatal("dthread3:\n(%s)", error_buf);
 		}