archive_write: Set archive state to fatal if format or filters fail

archive_write: Set archive state to fatal if format or filters fail

In archive_write_header(), if the format method or a filter flush method
fails, we set the archive state to fatal, but we did not do this in
archive_write_data() or archive_write_finish_entry().  There is no good
reason for this discrepancy.  Not setting the archive state to fatal
means a subsequent archive_write_free() will invoke archive_write_close()
which may retry the operation and cause archive_write_free() to return
an unexpected ARCHIVE_FATAL.