XLSX import: fix handling of named ranges referring to PathMissing sheets

In case xl/externalLinks/externalLink1.xml refers to a sheet where type
is PathMissing, then both <sheetName> and <sheetData> gets ignored on
import. Make sure to also ignore named ranges referring to such external
documents.

The resulting named range was just a string anyway, and exporting this
back to XLSX results in Excel marking the whole file as corrupted.

Change-Id: Ifde07b5e59fba371f1f8ab3e82861c6997c6dbf0
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/118401
Reviewed-by: Miklos Vajna <vmiklos@collabora.com>
Tested-by: Jenkins

0 files changed, 0 insertions, 0 deletions