crash when setting not scanning back-yard

[anlalalu]

Reproduction Steps

1. tap 'more options'
2. tap 'settings'
3. tap 'advanced settings'
4. tap 'don't scan my back-yard'
5. wait for several seconds

Stack Trace

E/AndroidRuntime: FATAL EXCEPTION: Timer-0
Process: org.openbmap, PID: 2926
java.lang.NullPointerException
at org.openbmap.activities.AdvancedSettingsActivity$1$1.gotLocation(AdvancedSettingsActivity.java:89)
at org.openbmap.utils.CurrentLocationHelper$GetLastLocation.run(CurrentLocationHelper.java:129)
at java.util.Timer$TimerImpl.run(Timer.java:284)

Debug info

App Version = 0.8.18

Android Version = 4.4.4