storage/maria/ma_checkpoint.c:
  Definitions of LSN should be collected in
  the one file (ma_loghandler_lsn.h)
storage/maria/ma_loghandler.c:
  New calls to get first theoretical and first real LSN.
storage/maria/ma_loghandler.h:
  New calls to get first theoretical and first real LSN.
storage/maria/ma_loghandler_lsn.h:
  Defined yet another impossible LSN to indicate error.
storage/maria/ma_recovery.c:
  The first LSN call changed.
storage/maria/maria_read_log.c:
  The first LSN call changed.
storage/maria/unittest/Makefile.am:
  New unittest added.
storage/maria/unittest/ma_test_loghandler_first_lsn-t.c:
  New BitKeeper file ``storage/maria/unittest/ma_test_loghandler_first_lsn-t.c''