In some places I used the new IgnoreWarning() method, and that
was not a faithful translation of the previous code.

Regression from commit 52863266
"convert ErrCode to strong typedef"

Change-Id: Ie53f7a6b1830e5977510a0c32926e0c70c42dcd3
Reviewed-on: https://gerrit.libreoffice.org/41105Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Julien Nabet <serval2412@yahoo.fr>