Rover: minor format fix to GCS_MAVLink.cpp

APMrover2/GCS_Mavlink.cpp

@@ -195,6 +195,7 @@ void Rover::send_pid_tuning(mavlink_channel_t chan)
             return;
         }
     }
+
     // speed to throttle PID
     if (g.gcs_pid_mask & 2) {
         pid_info = &g2.attitude_control.get_throttle_speed_pid().get_pid_info();