Fixup 99af09bf36 with a few more
methods - otherwise BColorModifierTest.cxx doesn't link for
release builds.
Change-Id: I13f0d57e56ba4344564e2534c0ee4e4883ec4d23
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/115294
Tested-by: Jenkins
Reviewed-by: Thorsten Behrens <thorsten.behrens@allotropia.de>