Tools: replace location_offset() and get_distance() function calls with Location object member function calls

This allows removing duplicated code

Tools/Replay/Replay.cpp

@@ -768,7 +768,7 @@ void Replay::log_check_solution(void)
     float pitch_error = degrees(fabsf(euler.y - check_state.euler.y));
     float yaw_error = wrap_180_cd(100*degrees(fabsf(euler.z - check_state.euler.z)))*0.01f;
     float vel_error = (velocity - check_state.velocity).length();
-    float pos_error = get_distance(check_state.pos, loc);
+    float pos_error = check_state.pos.get_distance(loc);
 
     check_result.max_roll_error  = MAX(check_result.max_roll_error,  roll_error);
     check_result.max_pitch_error = MAX(check_result.max_pitch_error, pitch_error);