Flattens function implementations by returning early when an argument check fails rather than using if/else blocks. Change-Id: I5adad466e41ac95ad5bde43d758babf5932ec304 Reviewed-on: https://gerrit.libreoffice.org/c/core/+/187606 Reviewed-by: Mike Kaganski <mike.kaganski@collabora.com> Tested-by: Jenkins