Add more diagnostic code to determine when an lsn field gets corrupt; tracks a crash reported from one Itanium computer


innobase/os/os0file.c:
  Add more diagnostic code to determine when an lsn field gets corrupt; tracks a crash reported from one Itanium computer
innobase/buf/buf0flu.c:
  Add more diagnostic code to determine when an lsn field gets corrupt; tracks a crash reported from one Itanium computer