Add required backslash for macro expansion

Marlin/ultralcd.cpp

@@ -1025,21 +1025,21 @@ void lcd_sdcard_menu() {
 }
 
 #define menu_edit_type(_type, _name, _strFunc, scale) \
-  bool menu_edit_ ## _name () { \
-    bool isClicked = LCD_CLICKED;
-    if ((int32_t)encoderPosition < 0) encoderPosition = 0; \
-    if ((int32_t)encoderPosition > maxEditValue) encoderPosition = maxEditValue; \
-    if (lcdDrawUpdate) \
-        lcd_implementation_drawedit(editLabel, _strFunc(((_type)((int32_t)encoderPosition + minEditValue)) / scale)); \
-    if (isClicked) { \
-      *((_type*)editValue) = ((_type)((int32_t)encoderPosition + minEditValue)) / scale; \
-      lcd_goto_menu(prevMenu, prevEncoderPosition); \
+    bool menu_edit_ ## _name () { \
+      bool isClicked = LCD_CLICKED;
+      if ((int32_t)encoderPosition < 0) encoderPosition = 0; \
+      if ((int32_t)encoderPosition > maxEditValue) encoderPosition = maxEditValue; \
+      if (lcdDrawUpdate) \
+          lcd_implementation_drawedit(editLabel, _strFunc(((_type)((int32_t)encoderPosition + minEditValue)) / scale)); \
+      if (isClicked) { \
+        *((_type*)editValue) = ((_type)((int32_t)encoderPosition + minEditValue)) / scale; \
+        lcd_goto_menu(prevMenu, prevEncoderPosition); \
+      } \
+      return isClicked; \
+    } \
+    void menu_edit_callback_ ## _name () { \
+      if (menu_edit_ ## _name ()) (*callbackFunc)(); \
     } \
-    return isClicked;
-  } \
-  void menu_edit_callback_ ## _name () { \
-    if (menu_edit_ ## _name ()) (*callbackFunc)(); \
-  } \
   static void _menu_action_setting_edit_ ## _name (const char* pstr, _type* ptr, _type minValue, _type maxValue) { \
     prevMenu = currentMenu; \
     prevEncoderPosition = encoderPosition; \