when corruption occurs, not clsing the db is casuing stack overflow

due to a bug in DefaultDatabaseErrorHandler, if the corruption is
so bad that the list of attached databases can't even be retrieved,
then database is not closed in DefaultDatabaseErrorHandler,
this causes the corrupted file to remain on disk.
this causes corruption detection to occur forever until the stack
overflows.

Change-Id: I9896bee220231cbde0b1620ad0a617420424967c