* sqldb: Firebird/Interbase: now Win64 SEH is enabled (r23732), 
  revert BLOB workaround in r20633 as it slows down blob handling
  (for all platforms even).

git-svn-id: http://svn.freepascal.org/svn/fpc/trunk@23738 3ad0048d-3df7-0310-abae-a5850022a9f2