1. PrevectorClear()
2nd call of clear() should to operate t1 instead of t0.
This patch changes t0 to t1.
2. PREVECTOR_TEST()
PREVECTOR_TEST macro should to call both
PrevectorXX<nontrivial_t>(state) and PrevectorXX<trivial_t>(state)
by specific "name" which given by parameter instead of calling
PrevectorResize<>() regardless of "name".
This patch changes "PrevectorResize<" of this macro to
"Prevector ## name<".