avoid the use of an uninitialised variable in one of the codepaths in pool_setlowat()
avoid the use of an uninitialised variable in one of the codepaths in
pool_setlowat()

ok dlg@ tedu@

orumin/openbsd-efivars,orumin/openbsd-efivars,orumin/openbsd-efivars,orumin/openbsd-efivars