This update for optipng fixes the following issues:

Update to 0.7.8:

* CVE-2023-43907: Fixed a global-buffer-overflow vulnerability in the GIF reader (boo#1215937).
* Fixed a stack-print-after-scope defect in the error handler.
* Fixed an assertion failure in the image reduction module.
* Fixed the command-line wildargs expansion in the Windows port.
* Refactored the structured exception handling.