Bug 2235: Fixed NPE in PathPolicy(long, List).

Change-Id: I11b3992036f953363445a4acb3b2ca1b73cb6390
Signed-off-by: Shigeru Yasuda <s-yasuda@da.jp.nec.com>
(cherry picked from commit c67b179fb04501e48aa9683bac7bf7d07e37dc30)