Merge commit '999d483bf8fc4271c42484aaf253f12e4eb8ff29' * commit '999d483bf8fc4271c42484aaf253f12e4eb8ff29': Don't crash if we've never gotten a signal strength update.
Merge commit '999d483bf8fc4271c42484aaf253f12e4eb8ff29' * commit '999d483bf8fc4271c42484aaf253f12e4eb8ff29': Don't crash if we've never gotten a signal strength update.