DSOAL r502 - Avoid another duplicate check

DSOAL r502@17aa05a2 c++-rewrite - Avoid another duplicate check [2023-04-18 13:38:37 +0000]
OpenAL Soft r8515@d9fed51a master - Make sure extension functions are properly aligned on 32-bit [2023-04-13 06:39:57 +0000]
Build log: https://github.com/ThreeDeeJay/dsoal/actions/runs/10753957116/job/29823994721

Full Changelog: r495...r502