Patch for caselight + lcd compile issues

Marlin/src/feature/caselight.cpp

 
 #if HAS_CASE_LIGHT
 
-int case_light_brightness = CASE_LIGHT_DEFAULT_BRIGHTNESS;
+uint8_t case_light_brightness = CASE_LIGHT_DEFAULT_BRIGHTNESS;
 bool case_light_on = CASE_LIGHT_DEFAULT_ON;
     
 #ifndef INVERT_CASE_LIGHT
 
 void update_case_light() {
   SET_OUTPUT(CASE_LIGHT_PIN);
-  uint8_t case_light_bright = (uint8_t)case_light_brightness;
   if (case_light_on) {
     if (USEABLE_HARDWARE_PWM(CASE_LIGHT_PIN)) {
       analogWrite(CASE_LIGHT_PIN, INVERT_CASE_LIGHT ? 255 - case_light_brightness : case_light_brightness );

Marlin/src/feature/caselight.h

 #ifndef __CASELIGHT_H__
 #define __CASELIGHT_H__
 
-extern int case_light_brightness;  // LCD routine wants INT
+extern uint8_t case_light_brightness;
 extern bool case_light_on;
 
 void update_case_light();

Marlin/src/lcd/ultralcd.cpp

 
   #if ENABLED(MENU_ITEM_CASE_LIGHT)
 
-    extern int case_light_brightness;
-    extern bool case_light_on;
-    extern void update_case_light();
+    #include "../feature/caselight.h"
 
     void case_light_menu() {
       START_MENU();
       // ^ Main
       //
       MENU_BACK(MSG_MAIN);
-      MENU_ITEM_EDIT_CALLBACK(int3, MSG_CASE_LIGHT_BRIGHTNESS, &case_light_brightness, 0, 255, update_case_light, true);
+      MENU_ITEM_EDIT_CALLBACK(int8, MSG_CASE_LIGHT_BRIGHTNESS, &case_light_brightness, 0, 255, update_case_light, true);
       MENU_ITEM_EDIT_CALLBACK(bool, MSG_CASE_LIGHT, (bool*)&case_light_on, update_case_light);
       END_MENU();
     }