[Libreoffice] [PATCH] Fix for fdo#42178

[Ivan Timofeev]

Hi there,

I have fixed https://bugs.freedesktop.org/show_bug.cgi?id=42178 :-) ,
but I think an additional review will not be superfluous, since I am
still a newbie.

The fact is SwDocShell::GetWrtShell() always returns 0 in page
preview. And Writer dies due to that in "lcl_GetPrintUIOptions"
function (sw/source/ui/uno/unotxdoc.cxx).

The second patch makes testing of the first one easier. :-) Because,
when you press "Cancel" in a print dialog, then make changes to a doc
and open a print dialog again, you currently will not see any effect.
Options will not be updated. The patch fixes this.

If someone will approve the patches, I will push them.

Thanks,
        Ivan
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