[Libreoffice] semantics of ScBaseCell* lclCloneCell

[Kevin Hunter]

Hullo Calc Devs,

I'm nosing around ScBaseCell in sc/source/core/data/cell.cxx, and I'm 
curious about the semantics of the function lclCloneCell.  Specifically, 
when would that function ever return a NULL pointer?  Does Calc not know 
about all its cell types?  Perhaps extensions are able to add their own 
cell types and still use this function?  (Then why would they use this 
function?!)

Thanks,

Kevin