- Fix hook for GNU's error_at_line() not exiting if status != 0. If
error_one_per_line was used and suppressed a message, then error_at_line()
didn't exit.
- Fix hook for GNU's error_at_line() not exiting if status != 0. If
error_one_per_line was used and suppressed a message, then error_at_line()
didn't exit.