am f37447ba: Proper fix for zero signal strength and no_service. Fixes #2176141

Merge commit 'f37447bad3773b62176baa837908daf6edb44273' into eclair-mr2

* commit 'f37447bad3773b62176baa837908daf6edb44273':
  Proper fix for zero signal strength and no_service. Fixes #2176141