AP_Baro: params always use set method

libraries/AP_Baro/AP_Baro.cpp

@@ -885,7 +885,7 @@ void AP_Baro::update(void)
             // update altitude calculation
             float ground_pressure = sensors[i].ground_pressure;
             if (!is_positive(ground_pressure) || isnan(ground_pressure) || isinf(ground_pressure)) {
-                sensors[i].ground_pressure = sensors[i].pressure;
+                sensors[i].ground_pressure.set(sensors[i].pressure);
             }
             float altitude = sensors[i].altitude;
             float corrected_pressure = sensors[i].pressure + sensors[i].p_correction;

libraries/AP_Baro/AP_Baro.h

@@ -173,7 +173,7 @@ public:
     uint8_t num_instances(void) const { return _num_sensors; }
 
     // set baro drift amount
-    void set_baro_drift_altitude(float alt) { _alt_offset = alt; }
+    void set_baro_drift_altitude(float alt) { _alt_offset.set(alt); }
 
     // get baro drift amount
     float get_baro_drift_offset(void) const { return _alt_offset_active; }