When we set up to start following a journal, if we get error results from sd_journal_get_fd() or sd_journal_get_events() that prevent us from following the journal, report the error instead of just mysteriously failing. Signed-off-by: Nalin Dahyabhai <nalin@redhat.com> (github: nalind) Upstream-commit: 8d597d25a86c608e2e1e4ef150d7e9eb68306bc0 Component: engine