AP_Airspeed: fixed airspeed in Replay

libraries/AP_Airspeed/AP_Airspeed.cpp

@@ -240,5 +240,8 @@ void AP_Airspeed::setHIL(float airspeed, float diff_pressure, float temperature)
     _raw_airspeed = airspeed;
     _airspeed = airspeed;
     _last_pressure = diff_pressure;
-    _last_update_ms         = hal.scheduler->millis();    
+    _last_update_ms = hal.scheduler->millis();    
+    _hil_pressure = diff_pressure;
+    _hil_set = true;
+    _healthy = true;
 }

libraries/AP_Airspeed/AP_Airspeed.h

@@ -138,7 +138,7 @@ public:
     // return health status of sensor
     bool healthy(void) const { return _healthy; }
 
-    void setHIL(float pressure) { _hil_set=true; _hil_pressure=pressure; };
+    void setHIL(float pressure) { _healthy=_hil_set=true; _hil_pressure=pressure; };
 
     // return time in ms of last update
     uint32_t last_update_ms(void) const { return _last_update_ms; }