Don't pass wifi pointer into libWeave if interface is not available

BUG: 24111116
Change-Id: I4f3f54348574c63656904d34928ff90bc93823ec
Reviewed-on: https://weave-review.googlesource.com/1116
Reviewed-by: Vitaly Buka <vitalybuka@google.com>
3 files changed
tree: 9ff5a604b7571b7fb84faf314a0b6bb9f56a69f8
  1. libweave/