Blimp: clear RC failsafe state if disables occurs while in RC failsafe

Blimp/radio.cpp

@@ -100,6 +100,7 @@ void Blimp::set_throttle_and_failsafe(uint16_t throttle_pwm)
 {
     // if failsafe not enabled pass through throttle and exit
     if (g.failsafe_throttle == FS_THR_DISABLED) {
+        set_failsafe_radio(false);
         return;
     }