Add basic layer to sample MIDI keycap

quantum/process_keycode/process_audio.c

@@ -28,7 +28,7 @@ bool process_audio(uint16_t keycode, keyrecord_t *record) {
         {
             audio_on();
         }
-      return false;
+        return false;
     }
 
     if (keycode == MUV_IN && record->event.pressed) {

quantum/process_keycode/process_music.c

@@ -142,7 +142,8 @@ bool process_music(uint16_t keycode, keyrecord_t *record) {
       if (keycode < 0xFF) // ignores all normal keycodes, but lets RAISE, LOWER, etc through
         return false;
     }
-  return true;
+
+    return true;
 }
 
 bool is_music_on(void) {