Bug#1012987: libpodofo: ftbfs with GCC-12

[yokota]

Hello Debian libpodofo maintainer,
I maintain Debian Calibre which uses libpodofo.

I make FTBFS fix to Debian libpodofo at:
  https://salsa.debian.org/debian/libpodofo/-/merge_requests/2

Please examine this merge request.

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YOKOTA