';' for Fn key: send ';' when key realease without using the layer

keymap_hhkb.h

@@ -4,10 +4,16 @@
 #include <stdint.h>
 #include "usb_keycodes.h"
 
-int get_layer(void);
-uint8_t get_keycode(int layer, int row, int col);
 
 #define MATRIX_ROWS 8
 #define MATRIX_COLS 8
 
+
+extern int current_layer;
+extern bool key_sent;
+
+
+int get_layer(void);
+uint8_t get_keycode(int layer, int row, int col);
+
 #endif