Merge pull request #1098 from mattsch/optional_hotend_lcd

Make hotend optional when compiling with lcd support

Marlin/ultralcd.cpp

     START_MENU();
     MENU_ITEM(back, MSG_MAIN, lcd_main_menu);
     MENU_ITEM_EDIT(int3, MSG_SPEED, &feedmultiply, 10, 999);
+#if TEMP_SENSOR_0 != 0
     MENU_ITEM_EDIT(int3, MSG_NOZZLE, &target_temperature[0], 0, HEATER_0_MAXTEMP - 15);
+#endif
 #if TEMP_SENSOR_1 != 0
     MENU_ITEM_EDIT(int3, MSG_NOZZLE1, &target_temperature[1], 0, HEATER_1_MAXTEMP - 15);
 #endif
 
     START_MENU();
     MENU_ITEM(back, MSG_CONTROL, lcd_control_menu);
+#if TEMP_SENSOR_1 != 0
     MENU_ITEM_EDIT(int3, MSG_NOZZLE, &target_temperature[0], 0, HEATER_0_MAXTEMP - 15);
+#endif
 #if TEMP_SENSOR_1 != 0
     MENU_ITEM_EDIT(int3, MSG_NOZZLE1, &target_temperature[1], 0, HEATER_1_MAXTEMP - 15);
 #endif
     MENU_ITEM_EDIT(int3, MSG_BED, &target_temperature_bed, 0, BED_MAXTEMP - 15);
 #endif
     MENU_ITEM_EDIT(int3, MSG_FAN_SPEED, &fanSpeed, 0, 255);
-#ifdef AUTOTEMP
+#if defined AUTOTEMP && (TEMP_SENSOR_0 != 0)
     MENU_ITEM_EDIT(bool, MSG_AUTOTEMP, &autotemp_enabled);
     MENU_ITEM_EDIT(float3, MSG_MIN, &autotemp_min, 0, HEATER_0_MAXTEMP - 15);
     MENU_ITEM_EDIT(float3, MSG_MAX, &autotemp_max, 0, HEATER_0_MAXTEMP - 15);
     START_MENU();
     MENU_ITEM(back, MSG_TEMPERATURE, lcd_control_temperature_menu);
     MENU_ITEM_EDIT(int3, MSG_FAN_SPEED, &plaPreheatFanSpeed, 0, 255);
+#if TEMP_SENSOR_0 != 0
     MENU_ITEM_EDIT(int3, MSG_NOZZLE, &plaPreheatHotendTemp, 0, HEATER_0_MAXTEMP - 15);
+#endif
 #if TEMP_SENSOR_BED != 0
     MENU_ITEM_EDIT(int3, MSG_BED, &plaPreheatHPBTemp, 0, BED_MAXTEMP - 15);
 #endif
     START_MENU();
     MENU_ITEM(back, MSG_TEMPERATURE, lcd_control_temperature_menu);
     MENU_ITEM_EDIT(int3, MSG_FAN_SPEED, &absPreheatFanSpeed, 0, 255);
+#if TEMP_SENSOR_0 != 0
     MENU_ITEM_EDIT(int3, MSG_NOZZLE, &absPreheatHotendTemp, 0, HEATER_0_MAXTEMP - 15);
+#endif
 #if TEMP_SENSOR_BED != 0
     MENU_ITEM_EDIT(int3, MSG_BED, &absPreheatHPBTemp, 0, BED_MAXTEMP - 15);
 #endif