Patch tabs, heater led tests

Marlin/src/lcd/HD44780/ultralcd_HD44780.cpp

@@ -1066,9 +1066,13 @@ void MarlinUI::draw_status_screen() {
       static uint8_t ledsprev = 0;
       uint8_t leds = 0;
 
-      if (thermalManager.degTargetBed() > 0) leds |= LED_A;
+      #if HAS_HEATED_BED
+        if (thermalManager.degTargetBed() > 0) leds |= LED_A;
+      #endif
 
-      if (thermalManager.degTargetHotend(0) > 0) leds |= LED_B;
+      #if HOTENDS
+        if (thermalManager.degTargetHotend(0) > 0) leds |= LED_B;
+      #endif
 
       #if FAN_COUNT > 0
         if (0