Make sure to turn off LED on suspend.

src/gnuk.h

@@ -434,6 +434,7 @@ extern const uint8_t gnuk_string_serial[];
 #define LED_GNUK_EXEC		 32
 #define LED_START_COMMAND	 64
 #define LED_FINISH_COMMAND	128
+#define LED_OFF	 LED_FINISH_COMMAND
 void led_blink (int spec);
 
 #if defined(PINPAD_SUPPORT)

src/usb-ccid.c

@@ -1648,6 +1648,7 @@ usb_event_handle (struct usb_dev *dev)
       break;
 
     case USB_EVENT_DEVICE_SUSPEND:
+      led_blink (LED_OFF);
       chopstx_conf_idle (1);
       bDeviceState |= USB_DEVICE_STATE_SUSPEND;
       break;