Snippets for dolphin-emu 2609 from FreeBSD 151amd64

Sourced from https://pkg-status.freebsd.org/beefy23/data/latest-per-pkg/dolphin-emu/2609/151amd64-default.log.

• /wrkdirs/usr/ports/emulators/dolphin-emu/work/dolphin-2609/Externals/VulkanMemoryAllocator/include/vk_mem_alloc.h:6207:11: warning: private field 'placeholder' is not used [-Wunused-private-field]
   6207 |     void* placeholder = VMA_NULL;
        |           ^