by adding 0x31, VisualFoxProAuto on array of valid marks in lcl_MayBeDBase
See https://opengrok.libreoffice.org/xref/core/connectivity/source/inc/dbase/DTable.hxx#40
and https://opengrok.libreoffice.org/xref/core/include/connectivity/dbtools.hxx#823

Yes, it should be great to have only 1 enum

Change-Id: Ic3fb74c838aab5e744cbe1d70ad8ca4ce2c00b8d
Reviewed-on: https://gerrit.libreoffice.org/54894Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Julien Nabet <serval2412@yahoo.fr>