SwFrmFmt::FindRealSdrObject() and stacking order

[Lubos Lunak]

 Hello,

 could somebody more knowledgeable of Writer internals please review this?

 While working on support for stacking order in the .docx filter, I found out 
that setting z-order for an image using UNO and later trying to retrieve the 
value fails. The attached sw.patch fixes that for me, and I checked that .odt 
export/import (which uses it too) still works. But I have no idea what the 
difference actually is, besides making reading use the same value like 
writing.

-- 
 Lubos Lunak
 l.lunak at suse.cz
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