Enforce minimum track length with SAO

libburn/file.h

@@ -3,10 +3,16 @@
 #ifndef BURN__FILE_H
 #define BURN__FILE_H
 
+/* ts A70125 : 
+   Looks like burn_source_file and burn_source_fd become identical because
+   of the need to set a fixed_size of at least 600 kB.
+   I will try to unify both classes.
+*/
 struct burn_source_file
 {
 	int datafd;
 	int subfd;
+	off_t fixed_size;
 };