This change makes SdrObject an abstract class that can't be as
we don't want it to be instantiated. With this the ClonseSdrObject
became a pure virtual function.
With this change also the SwFlyDrawObj needs a implementation of
the CloneSdrFunction, which was previously provided by SdrObject.
Change-Id: I2efb8c1e6fac12b17ce497285067029d7da1c1fd
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/148239
Tested-by: Jenkins
Reviewed-by: Tomaž Vajngerl <quikee@gmail.com>
Tomaž Vajngerl
b53b01a050