Kristof Provost c201b5644d pf: Avoid warning without INVARIANTS
When INVARIANTS is not set the 'last' variable is not used, which can generate
compiler warnings.
If this invariant is ever violated it'd result in a KASSERT failure in
refcount_release(), so this one is not strictly required.
2018-02-01 07:52:06 +00:00
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2018-02-01 07:52:06 +00:00