Bug fix: -boot_image "any" "system_area=/dev/zero" did not zeroize loaded data

xorriso/iso_img.c

@@ -113,6 +113,8 @@ int Xorriso_create_empty_iso(struct XorrisO *xorriso, int flag)
  Xorriso_update_volid(xorriso, 0);
  xorriso->volset_change_pending= 0;
  xorriso->boot_count= 0;
+ xorriso->system_area_clear_loaded=
+                    (strcmp(xorriso->system_area_disk_path, "/dev/zero") == 0);
  xorriso->no_volset_present= 0;
  return(1);
 }