ChangeLog, journal.c, problem.c, problem.h:

ChangeLog, journal.c, problem.c, problem.h:
  journal.c (e2fsck_journal_reset_super): Fix bug; the reset journal
  	wasn't getting written out to disk since the dirty bit wasn't being
  	set on the buffer.
  	(e2fsck_journal_load): Don't print an error message if the journal
  	version number is wrong; just return a error code reflecting this
  	fact.  If the block type in the journal superblcok is obviously not a
  	version number, report the journal is corrupted.
  	(e2fsck_check_ext3_journal): On an unsupported journal version, prompt
  	to abort by default, but then offer a chance to clear the journal as
  	corrupt.
  problem.c, problem.h (PR_0_JOURNAL_UNSUPP_VERSION): Added new problem code.