Insert blank page when first page number is even

When the page number is explicitly changed at a page break,
LibreOffice will insert a blank page if necessary to ensure that
even page numbers appear on "left" pages.

This commit fixes a case that was missed: the case where the page
number of the very first page in the document is explicitly set to
be an even number.

Also:

- adjust a couple of unit tests which were referring to specific
physical page numbers, that were not expecting this blank page to be
there

- enhance SwModelTestBase::parseDump to support xpath expressions
evaluating to simple values rather than nodes, for use in a
test case for this change

Change-Id: I1f41760c3bb17bdffb868cf32a1331de87d1d0e1
Reviewed-on: https://gerrit.libreoffice.org/39858
Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Miklos Vajna <vmiklos@collabora.co.uk>

0 files changed, 0 insertions, 0 deletions