template.exv different output on test runs

[neheb]

Describe the bug

No difference

To Reproduce

Steps to reproduce the behavior:

1. Run lens_tests

Expected behavior

No change in template.exv

Desktop (please complete the following information):

• OS and version: Fedora
• Exiv2 version and source: main
• Compiler and version: any
• Compilation mode and/or compiler flags: debug

Additional context

hexdump and diff shows these differences

< 0000470 ff00 ff7f 037f 0200 0000 0400 ff00 feff
< 0000480 46ee 1c00 0100 4000 4000 ff01 18ff 0040
---
> 0000470 ff00 ff7f 037f 0200 0000 0400 ff00 34ff
> 0000480 18f0 1800 0100 2500 4000 ff01 18ff 0040