Once freealut is updated, the next upload of openal-soft should probably include a Breaks: libalut-dev (< [whatever version it's fixed in]) on libopenal-dev, to help avoid inconsistent library installations, if someone tries to upgrade only openal.
Once freealut is updated, the next upload of openal-soft should probably include a Breaks: libalut-dev (< [whatever version it's fixed in]) on libopenal-dev, to help avoid inconsistent library installations, if someone tries to upgrade only openal.