Compiler issues (PR#2696)

Marlin/Marlin_main.cpp

 void kill(const char* lcd_msg) {
   #if ENABLED(ULTRA_LCD)
     lcd_setalertstatuspgm(lcd_msg);
+  #else
+    UNUSED(lcd_msg);
   #endif
 
   cli(); // Stop interrupts

Marlin/temperature.cpp

 
   #else
 
+    UNUSED(raw);
     return 0;
 
   #endif