SensorService doesn't crash if correct HAL is not present

Change-Id: I83700b1a1b43390f5830e1056572bfb16e58e8e4
diff --git a/services/sensorservice/SensorService.h b/services/sensorservice/SensorService.h
index 88b84ec..8731956 100644
--- a/services/sensorservice/SensorService.h
+++ b/services/sensorservice/SensorService.h
@@ -98,6 +98,7 @@
     struct sensors_poll_device_t* mSensorDevice;
     struct sensors_module_t* mSensorModule;
     Permission mDump;
+    status_t mInitCheck;
 
     // protected by mLock
     mutable Mutex mLock;