Commit
d21ce2e11c0cd9fbeefd04d1e7c39a52a9492b35
by nhofmeyrfix stat_item leak in hnb_persistent_free()
Add missing stat_item free in hnb_persistent_free().
We recently fixed a rate_ctr leak in
I14e050bfb91b993f194e3800eacdc0d10f2b1a4e, but missed the also leaking
stat_item.
Particularly relevant with upcoming patch
Ic819d7cbc03fb39e98c204b70d016c5170dc6307 -- testing that patch revealed
the leak.
Change-Id: I7326c53d595dce7b442eced89ff8f4b972bd2a82