tweak

Marlin/pins.h

@@ -114,18 +114,18 @@
 #define _E0_PINS E0_STEP_PIN, E0_DIR_PIN, E0_ENABLE_PIN, HEATER_0_PIN, analogInputToDigitalPin(TEMP_0_PIN),
 #if EXTRUDERS > 1
   #define _E1_PINS E1_STEP_PIN, E1_DIR_PIN, E1_ENABLE_PIN, HEATER_1_PIN, analogInputToDigitalPin(TEMP_1_PIN),
-#else
+  #if EXTRUDERS > 2
-  #define _E1_PINS
-#endif
-#if EXTRUDERS > 2
     #define _E2_PINS E2_STEP_PIN, E2_DIR_PIN, E2_ENABLE_PIN, HEATER_2_PIN, analogInputToDigitalPin(TEMP_2_PIN),
-#else
+    #if EXTRUDERS > 3
-  #define _E2_PINS
-#endif
-#if EXTRUDERS > 3
       #define _E3_PINS E3_STEP_PIN, E3_DIR_PIN, E3_ENABLE_PIN, HEATER_3_PIN, analogInputToDigitalPin(TEMP_3_PIN),
-#else
+    #else
       #define _E3_PINS
+    #endif
+  #else
+    #define _E2_PINS
+  #endif
+#else
+  #define _E1_PINS
 #endif
 
 #ifdef X_STOP_PIN