net-mgmt/ipfixcol2: Fix build on 13.x
PR: 285757
Approved by: Marek Zarychta <zarychtam@plan-b.pwste.edu.pl> (maintainer, implicit - fix build)
Co-authored-by: Chad Jacob Milios <milios@ccsys.com>
MFH: 2025Q3
(cherry picked from commit 928a3c361cd29524a46213ab70d8e6e2f9c6c754)