This is needed in order to make "TypeOf myLine Is Line" or similar
expressions return the expected "true" value.
The implementation of the basic interpreter of TypeOf uses XTypeProvider
to determine the type of an object by getting the last part of the type
name. E.g. "ooo:vba::msforms::XLine" is determined as a "Line". That's
why I created the XLine and XOval blank classes.
Reviewed-on: https://gerrit.libreoffice.org/42083Tested-by: Jenkins <firstname.lastname@example.org>
Reviewed-by: Tamás Bunth <email@example.com>