tree 96eef6fba44d42574dc6ca100629cca3eec05133
parent ea6944589f1e7812e50d111638d33b4c7d07e294
author Greg Kaiser <gkaiser@google.com> 1631032198 -0700
committer Treehugger Robot <treehugger-gerrit@google.com> 1631087257 +0000

Initialize root_ member by default

In case of a future coding error where SetRoot() doesn't get
called prior to GetRoot(), we at least assure consistent behavior
and avoid using uninitialized memory as a pointer.

Test: TreeHugger
Bug: 197828948
Change-Id: I858a54a706283fb0f81ad0c9f60d1adfa1e89eca