anv: Check file descriptor before closing.

Fix defect reported by Coverity Scan.

Argument cannot be negative (NEGATIVE_RETURNS)
negative_returns: fd is passed to a parameter that cannot be negative

Signed-off-by: Vinson Lee <vlee@freedesktop.org>
Reviewed-by: Marcin Ĺšlusarz <marcin.slusarz@intel.com>
Reviewed-by: Matt Turner <mattst88@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/6643>
1 file changed