fcld-db: dbase:
* Harden Visual FoxPro code: detect nil varbinary field source



git-svn-id: http://svn.freepascal.org/svn/fpc/trunk@26972 3ad0048d-3df7-0310-abae-a5850022a9f2
fcl-db: cosmetic



git-svn-id: http://svn.freepascal.org/svn/fpc/trunk@26973 3ad0048d-3df7-0310-abae-a5850022a9f2