Control size of extents with #define blocks, to help testing.

libisofs/ecma119_tree.c

@@ -161,7 +161,7 @@ int create_file(Ecma119Image *img, IsoFile *iso, Ecma119Node **node)
     off_t size;
 
     size = iso_stream_get_size(iso->stream);
-    if (size > (off_t)0xffffffff && img->iso_level != 3) {
+    if (size > (off_t)MAX_ISO_FILE_SECTION_SIZE && img->iso_level != 3) {
         return iso_msg_submit(img->image->id, ISO_FILE_TOO_BIG, 0,
                               "File \"%s\" can't be added to image because "
                               "is greater than 4GB", iso->node.name);