AP_Proximity: resolve compiler warning and format fix

libraries/AP_Proximity/AP_Proximity_RangeFinder.cpp

@@ -24,8 +24,8 @@ extern const AP_HAL::HAL& hal;
 
 AP_Proximity_RangeFinder::AP_Proximity_RangeFinder(AP_Proximity &_frontend,
                                    AP_Proximity::Proximity_State &_state) :
-    _distance_upward(-1),
-    AP_Proximity_Backend(_frontend, _state)
+    AP_Proximity_Backend(_frontend, _state),
+    _distance_upward(-1)
 {
 }
 

libraries/AP_Proximity/AP_Proximity_RangeFinder.h

@@ -17,7 +17,7 @@ public:
 
     // get maximum and minimum distances (in meters) of sensor
     float distance_max() const { return _distance_max; }
-    float distance_min() const { return _distance_min; };
+    float distance_min() const { return _distance_min; }
 
     // get distance upwards in meters. returns true on success
     bool get_upward_distance(float &distance) const;