Correct error handling in two hard to hit ENOTDIR error cases. These would previously leave the ntnode locked and neglect to decrement the use count.
Correct error handling in two hard to hit ENOTDIR error cases. These would
previously leave the ntnode locked and neglect to decrement the use count.

ok krw@ miod@

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