AP_HAL_PX4: fix UAVCAN armed state to depend on safety switch

libraries/AP_HAL_PX4/RCOutput.cpp

@@ -499,8 +499,7 @@ void PX4RCOutput::_send_outputs(void)
                             ap_uc->rco_write(_period[i], i);
                         }
 
-                        bool armed = hal.util->get_soft_armed();
+                        if (hal.util->safety_switch_state() != AP_HAL::Util::SAFETY_DISARMED) {
-                        if (armed) {
                             ap_uc->rco_arm_actuators(true);
                         } else {
                             ap_uc->rco_arm_actuators(false);