fdo#59405: initialize members of TransferableObjectDescriptor
fdo#59405: initialize members of TransferableObjectDescriptor

The mnViewAspect member is otherwise only initialized if a
SOT_FORMATSTR_ID_OBJECTDESCRIPTOR thingy is in the clipboard, which only
happens if the clipboard source is OOo/LO.
When inserting an OLE object, the value MSOLE_CONTENT apparently results
in requesting the current size from the OLE object, which looks much
better than the square default.

Change-Id: I8c7fb80a8ae88272f1ecaf3a375bef5d917f2a5b

JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core