graphics/py-python-poppler-qt5: fix build on FreeBSD 13

Patch picked from upstream repo

Fix the build failures on older FreeBSD versions due
to the recently updated graphics/poppler port.

PR: 276263
Reported by: Martin Neubauer <m.ne@gmx.net> (maintainer)

(cherry picked from commit 5d826246f8a360246c1f8c8fdbed1618f9dbbfe9)