i686 Linux build failure error: no viable conversion from 'xmlDocUniquePtr'

[Luke Benes]

On Arch linux 32, I'm seeing the following build failure

[CXX] sd/qa/unit/export-tests.cxx
/core/sd/qa/unit/export-tests.cxx:1284:15: error: no viable conversion from 'xmlDocUniquePtr' (aka 'unique_ptr<_xmlDoc, xmlDocDeleter>') to 'xmlDocPtr' (aka '_xmlDoc *')
    xmlDocPtr pXmlDoc = parseExport(tempFile, "content.xml");
              ^         ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
[CXX] sd/qa/unit/HtmlExportTest.cxx
1 error generated.
make[1]: *** [/core/solenv/gbuild/LinkTarget.mk:306: /core/workdir/CxxObject/sd/qa/unit/export-tests.o] Error 1
make[1]: *** Waiting for unfinished jobs....

Mike,

This seems to have begun after
https://cgit.freedesktop.org/libreoffice/core/commit/?id=5ac2075d56cff

Any idea how to fix?

Thanks

-Luke