MediaNode: Wait for 0 time if the absolute timeout is in the past

src/kits/media/MediaNode.cpp

@@ -343,6 +343,10 @@ BMediaNode::WaitForMessage(bigtime_t waitUntil, uint32 flags,
 	char data[B_MEDIA_MESSAGE_SIZE];
 	int32 message;
 	ssize_t size;
+
+	if (waitUntil < TimeSource()->RealTime())
+		waitUntil = 0;
+
 	while (true) {
 		size = read_port_etc(ControlPort(), &message, data,
 			sizeof(data), B_ABSOLUTE_TIMEOUT, waitUntil);