Initialize ipa_nirq in isascan(). Gets rid of spurious irq locators being printed for isadma(4).
Initialize ipa_nirq in isascan(). Gets rid of spurious irq locators being
printed for isadma(4).

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