Fix compilation warnings, errors (#14704)

Marlin/src/HAL/HAL_DUE/Servo_Due.cpp

   #endif
 }
 
-void finISR(timer16_Sequence_t timer) {
+void finISR(timer16_Sequence_t) {
   #ifdef _useTimer1
     TC_Stop(TC_FOR_TIMER1, CHANNEL_FOR_TIMER1);
   #endif

Marlin/src/core/language.h

 
 // NOTE: IF YOU CHANGE LANGUAGE FILES OR MERGE A FILE WITH CHANGES
 //
-//   ==> ALWAYS TRY TO COMPILE MARLIN WITH/WITHOUT "ULTIPANEL" / "ULTRALCD" / "SDSUPPORT" #define IN "Configuration.h"
+//   ==> ALWAYS TRY TO COMPILE MARLIN WITH/WITHOUT "ULTIPANEL" / "ULTRA_LCD" / "SDSUPPORT" #define IN "Configuration.h"
 //   ==> ALSO TRY ALL AVAILABLE LANGUAGE OPTIONS
 // See also http://marlinfw.org/docs/development/lcd_language.html
 

Marlin/src/lcd/ultralcd.cpp

       return;
     }
 
-  #endif // HAS_LCD_MENU
+  #endif
 
   #if ENABLED(ULTIPANEL_FEEDMULTIPLY)
 
           card.release();
           if (old_sd_status != 2) {
             set_status_P(PSTR(MSG_SD_REMOVED));
-            if (!on_status_screen()) return_to_status();
+            #if HAS_LCD_MENU
+              return_to_status();
+            #endif
           }
         }
 

Marlin/src/module/tool_change.cpp

     if (new_tool == active_extruder) return;
   #endif
 
-  const uint8_t old_tool = active_extruder;
-
   #if ENABLED(MIXING_EXTRUDER)
 
     UNUSED(no_move);
       constexpr bool idex_full_control = false;
     #endif
 
+    const uint8_t old_tool = active_extruder;
     const bool can_move_away = !no_move && !idex_full_control;
 
     #if ENABLED(TOOLCHANGE_FILAMENT_SWAP)