fix annoying bug where the first character would be eaten, cnischar() was wreaking havoc.
fix annoying bug where the first character would be eaten, cnischar() was
wreaking havoc.

from miod@

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