fcl-db/dbase:
* fixed tests TTestSpecificTDBF.TestCodePage and TestTableLevel
* fixed division by zero for null length record size memos (e.g. if no memo file present)

git-svn-id: http://svn.freepascal.org/svn/fpc/trunk@24338 3ad0048d-3df7-0310-abae-a5850022a9f2