tree 8734ddd3e52b5736bf699fd5677774392bd63ef3
parent f4b22c59e1eacd906fc6911ce13b58a17ed8fbee
author Andrew Scull <ascull@google.com> 1539957260 +0100
committer Andrew Scull <ascull@google.com> 1539960554 +0100

Make page level an unsigned value.

A negative level isn't valid and expressing that in the type allows the
analyzers to better understand the code.

Change-Id: Ibae6d8a94358536428e5f6594e27e051e1675439