Using usleep() instead of nanosleep() which is not available on Solaris 9

cdrskin/cdrskin_timestamp.h

@@ -1 +1 @@
-#define Cdrskin_timestamP "2011.01.16.140456"
+#define Cdrskin_timestamP "2011.01.18.162859"

libburn/file.c

@@ -211,9 +211,10 @@ struct burn_source *burn_fd_source_new(int datafd, int subfd, off_t size)
 
 static int fifo_sleep(int flag)
 {
-	static struct timespec sleeptime = { 0, 50000000}; /* 50 ms */
+	static unsigned long sleeptime = 50000; /* 50 ms */
 
-	return nanosleep(&sleeptime, NULL);
+	usleep(sleeptime);
+	return 0;
 }