Fix compile error on Brillo

Returning false in place of a pointer. I wonder how it compiles on
Ubuntu. :)

Change-Id: I4c247e0382bb8f745ce1825ec992a690f71e401d
Reviewed-on: https://weave-review.googlesource.com/1810
Reviewed-by: Vitaly Buka <vitalybuka@google.com>