MFH: r454577

audio/sox: Fix segfault in the OSS backend

sox currently crashes when it finishes playing a file.

PR: 213262
Approved by: Dan Nelson <dnelson@allantgroup.com> (maintainer)
Reported by: Alexandros Perdikomatis <alexandrosperdikomatis@gmail.com>
Obtained from: Pkgsrc

Approved by: ports-secteam blanket