Snippets for aften 0.0.8 from FreeBSD 151arm64

Sourced from https://pkg-status.freebsd.org/ampere5/data/latest-per-pkg/aften/0.0.8/151arm64-default.log.

• /wrkdirs/usr/ports/audio/aften/work/aften-0.0.8/libaften/bitalloc.c:375:21: warning: shifting a negative signed value is undefined [-Wshift-negative-value]
    375 |     if(snroffset == SNROFFST(0, 0)) {
        |                     ^~~~~~~~~~~~~~