util/futex: fix dangling pointer use
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=110901
Fixes: 7dc2f478 "util: emulate futex on FreeBSD using umtx"
Cc: Greg V @myfreeweb
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Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=110901
Fixes: 7dc2f478 "util: emulate futex on FreeBSD using umtx"
Cc: Greg V @myfreeweb