Bug#1075105: jxrlib: ftbfs with GCC-14

[yokota]

Hello Debian PhotoTools Maintainers,

I was added marge request to jxrlib and fix FTBFS error with GCC-14.
https://salsa.debian.org/debian-phototools-team/jxrlib/-/merge_requests/4

Please fix this FTBFS issue on jxrlib.

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YOKOTA Hiroshi