HomeFreeBSD

In r362552, RB_SET_PARENT is defined, and use in parens in

Description

In r362552, RB_SET_PARENT is defined, and use in parens in
RB_CLEAR_NODE. But it is not an expression, and ought not to be
enclosed in parens. Remove them.

Approved by: markj
Differential Revision: https://reviews.freebsd.org/D25421

Details