tree 412378e18a869a2bfd0a1c0e779e766cd8bd52ee
parent 7c412ea4b569eeec5eb571c92cc4682595cd5254
author Angie Chiang <angiebird@google.com> 1496192553 -0700
committer Angie Chiang <angiebird@google.com> 1496428186 +0000

Add update_level_down()

This function will update txb_cache and txb_info affected by
downgrading the coeff by one level

Change-Id: I57f9377eb7fb94b4244e677704b33c5eece83133