In era-staccato-lib.stc, made avl-get-max-depth return a bigint instead of a list of nils.
In era-staccato-lib.stc, made avl-get-max-depth return a bigint instead of a list of nils.

era-platform/cene,rocketnia/era,era-platform/cene,era-platform/cene,rocketnia/era-cene,rocketnia/era,rocketnia/era-cene,rocketnia/era-cene,rocketnia/era