rcu: tree_plugin.h: use true/false in assignment to bool

bool variables in this code are using true/false for assignments
fix this up for consistency/readability.

Signed-off-by: Nicholas Mc Guire <der.herr@hofr.at>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
1 file changed